Screen Broadcast and Teaching Demonstration 27 items

A suite of functions for projecting the screen to students. Screen broadcast, demonstration, live streaming, and cinema mode – only one runs at a time; starting a new one automatically stops the previous one, so they never conflict.

Screen Broadcast: Broadcast the teacher's entire desktop to the whole class in real time, student PCs automatically pop up a full-screen view
Window broadcast (bound window): Broadcast only the specified window; students cannot see other content on the desktop. Suitable for demonstrating only a certain software.
Area broadcast (select screen area): Use the mouse to select an area on the screen to broadcast only that area; you can cancel it anytime to restore full-screen broadcast.
Broadcast by list: Click or drag-select the computers and groups to receive; with none selected it goes straight to the whole class, and student PCs that connect later join automatically
Annotate during broadcasting: When broadcasting, an annotation toolbar appears, allowing selection of pen color/thickness, eraser, shapes, arrows, text, and highlighter; directly circle and annotate on the screen for explanation.
Annotation toolbar scales with screen ratio: Toolbar scales proportionally on 4K high-resolution screens, will not be too small to read.
Full-screen broadcast locks student keyboard and mouse: There are toggles (default on) in both the broadcast popup and broadcast settings; when receiving in full screen, student keyboard and mouse are locked, they can only watch but not interact
Student client receives in fullscreen or windowed mode: Students can receive in full-screen or switch to a window, watching the teacher's demonstration while following along.
Student demonstration: The demonstrating student's screen is pushed as the broadcast to the whole class or selected classmates; the student keeps working, and the teacher can watch or take over anytime
Live Streaming: Live broadcast of screen + camera + audio, camera overlay as picture-in-picture at bottom right, viewers can switch sources.
Broadcast with audio and camera together: Screen broadcast can include system audio, the teacher's microphone, and the camera at the same time, with no loss of clarity
Network Cinema: Synchronously play a video file (mp4 / mkv / avi / mov / wmv) to the entire class, while the teacher opens a separate window to monitor progress.
Shared whiteboard: Open a real-time shared drawing board; the teacher writes and draws, and the student side sees it synchronously, equivalent to an electronic blackboard.
Student collaborative whiteboard drawing: One-click on the whiteboard toolbar allows students to draw on the whiteboard as well; each student's strokes are displayed in real-time with a distinct color to the whole class, and permission can be revoked at any time.
File Download Panel During Broadcast: On the broadcast screen, provide students with a file list. Materials distributed by the teacher during class can be downloaded by students with a click.
Submit Homework Panel During Broadcast: Students can directly fill in their student ID, name, and class in the broadcast screen, and drag and drop files to submit homework, without exiting the broadcast.
Selectable transport: Three modes: broadcast, multicast, unicast. Choose one based on the computer lab switch and network policy.
Desktop Recording: One-click start or stop recording teacher's screen to file; can be played back after class or distributed as material to the whole class.
Student note screenshot: Students press F2 to take a screenshot for notes while watching a broadcast, automatically saved to "Documents / Class Notes".
Adjustable broadcast parameters: Resolution, frame rate, and bitrate are adjusted according to the computer lab network conditions, balancing clarity and smoothness
Auto-exclude demo machines: When broadcasting, the machine currently doing student demonstration is automatically excluded to avoid looping the screen back.
Broadcast drop-down menu: Full screen, window, region, bound window, and broadcast settings in one drop-down menu, with settings remembered
Send the board: Save the current annotation page (background plus annotations) as an image and send it to student PCs without interrupting the broadcast
Annotation toolbar stays off the broadcast: The teacher sees the toolbar, but it never appears in the broadcast or screenshots; similar tools are grouped, and it can be pinned to the top
Two ratios for windowed viewing: In windowed viewing, students can scale to the window or keep the original ratio, switch it themselves, and zoom with Ctrl+scroll wheel
Students can record the broadcast: Students can record the broadcast video and audio they receive and review it after class
Lossless quality mode: Broadcast can switch to lossless quality; when the screen stops moving it sharpens automatically, ideal for small text and drawings

Terminal group control (one-to-many synchronous operation) 12 items

Whatever the teacher does on their own machine, the selected student machines will synchronously follow—unified software installation, unified environment configuration, unified training steps, done for the whole class at once, no need to go to each machine.

Real-time Keyboard and Mouse Mirroring: The teacher's local mouse movements, clicks, scrolls, and keystrokes are replicated in real-time to each selected student PC and replayed on their desktops.
Controlled by list: Same selection method as screen broadcast: first select computers or groups on the main interface, no selection means no action, never implicitly apply to the whole class.
Automatic proportional mapping for different resolutions: Coordinates are normalized as percentages of the screen and sent; student machines render them according to their own resolution. Even if teacher and student resolutions differ, there will be no click offset.
Initial cursor alignment: When group control is enabled, the teacher's current cursor position is synchronized immediately, without needing to wiggle the mouse first to align.
Block student's local keyboard and mouse: During group control, students' own keyboards and mice are blocked; only the teacher's operations take effect, and students cannot interfere.
Teacher's local machine unrestricted: Teacher-end collection only monitors without blocking; the teacher operates normally on their own machine and will not be obstructed by the group control they initiated.
Global escape hotkey: Ctrl+Alt+G to end group control at any time, even if the main window is covered by the demo program and cannot be clicked, you can still exit
Floating end button not mirrored: When the teacher clicks the "End Group Control" window, mouse events in that area are not replicated to the entire class, and the student desktop will not receive an accidental click.
Three-fold self-protection on student endpoint: Automatically unfreeze if no group control packet is received within 10 seconds. Disconnection or exit releases the lock. If forcibly killed, the keyboard and mouse are restored according to the disk list on next boot – student machines are never permanently locked.
Automatic retransmission for late arrival and reconnection: Machines that were not powered on at the time but are on the list will be automatically included when they come online later; machines not on the list will never be included even if they come online at that time.
Back Pressure Protection: When a student's network is congested, only pure movement events are dropped; clicks and key presses are not lost, ensuring operations remain correct.
Model PC: Pick one student PC as the model; the teacher operates on its real screen and the whole class follows in sync

Scan to live stream · watch without client 9 items

The teacher console has a built-in live streaming service that generates a QR code with one click. Mobile phones, tablets, and laptops without the student client can scan the QR code on the same classroom network to watch in a browser—view-only, no control rights.

One-click broadcast generates QR code: Click "Live" to generate a QR code and intranet address for viewing; mobile phones and tablets can scan the code to open directly in a browser.
No installation, no plugin required: No app or browser plugin required on the viewing end; WeChat's built-in browser can play directly.
Screen with computer audio: Live broadcast synchronously carries the teacher's PC audio; when no sound card is detected, the status bar clearly prompts 'No audio output device'.
Camera picture-in-picture: The camera image is overlaid in the bottom-right corner. The viewer can switch between the computer screen and the camera feed.
Download materials from view page: The file panel at the top right of the viewing page lists materials distributed by the teacher during class, which can be downloaded directly on mobile phones.
Submit homework online from the viewing page: The viewer fills in student ID, name, and class, then submits the homework file. Files are archived in individual directories per student and appear in the teacher's assignment collection panel.
Classroom LAN only: Accessible only within the same classroom network. The viewing end is purely for viewing, with no control permissions.
Live streaming status indicator: The 'Live' indicator on the teacher console's main interface stays on, and displays the real-time count of devices watching
Hide window and continue live streaming: Collapsing the QR code window does not affect the live stream; click 'Live' again to recall it at any time.

Voice teaching and live classroom captions 10 items

Everything to do with sound in class sits behind one “Voice Teaching” entry: first select student PCs or a group below, then open it and pick a mode — voice broadcast, teacher–student intercom, group intercom, raise-hand-to-speak, designated speaker, or voice group chat. Only one runs at a time; switching modes automatically stops the previous one, so audio never overlaps. The pop-up status panel shows who is speaking, volume levels, mute and stop at a glance. During a screen broadcast you can also open the mic to narrate and turn speech into live captions — voice teaching and screen broadcasting never interrupt each other. Everything runs over the LAN and the sound never leaves the classroom, with identical results across Windows and Linux.

Related pages:Interactive TeachingSolutions

Voice broadcast: Open “Voice Teaching → Voice broadcast”; the teacher speaks into the mic and the sound is pushed in real time to the selected student PCs or the whole class. At any time you can use “Designated speaker” to let a student take the floor. When you stop, the student floating panel closes and the mic turns off automatically, so a student mic is never left open.
Teacher–student intercom: Hold a one-to-one live conversation with a single student, started by right-clicking that student; the exchange can be “demonstrated to the whole class” so other students can watch the Q&A, and the teacher can end it at any time.
Group intercom: Split students into groups so members of the same group can talk to each other; the teacher can “listen in” on any group, switch between groups, follow each discussion without interrupting it, and step in to guide when needed.
Raise-to-speak and assigned speaker: During Q&A, students raise a hand to “grab the mic”; whoever grabs it first gets to speak. The teacher sees the speaker and the waiting queue at a glance and can “take it back and start another round,” or use “Designated speaker” to pick a specific student directly.
Voice group chat: Students press and hold to record a short message to the group; the whole class can play each one back, with speaker and time shown. The teacher can “export all” at once or clear and start over — ideal for keeping a record of speaking practice, reading aloud and Q&A.
Live classroom captions: The teacher’s speech is turned into text in real time by on-device offline speech recognition and shown as captions at the bottom of every student screen; Chinese and English can be mixed. Recognition runs locally on the teacher’s machine and nothing is uploaded to the cloud (available when the teacher app runs on Windows).
Adjustable caption position: The teacher drags the caption bar to position it, and the captions on every student screen follow to the same spot, so they never cover what is being explained.
Save transcripts: The whole lesson’s speech is kept, sentence by sentence, as a transcript in the teacher panel; at any time you can “Save text” to export it to a file and hand it to students after class as board notes or dictation material.
Broadcast with microphone and captions: During a screen broadcast, one tick in the broadcast settings turns on the teacher’s mic and automatically opens live captions — students watch the teacher’s screen, hear the narration and see the captions all at once. Voice teaching and screen broadcasting run at the same time without interrupting each other.
Microphone echo cancellation: When the teacher’s machine plays sound out loud (for example a video), echo picked up again by the mic is cancelled automatically, so students hear cleaner speech without howling or feedback.

Classroom Interaction 18 items

Turn "teacher talks, students listen" into a two-way class: roll call, buzzer quizzes, polls, discussions, courseware pushes, and bullet comments, most delivered to the whole class instantly.

Random Roll Call: Random picks with a scrolling animation, synced to student screens; draw from the whole class, the selection, or a group, several at once, no repeats in the same class, and award points or call them up to present
Screenshot questions: During a screen broadcast, select an area as a question for students to answer on the spot; the broadcast freezes while the question is set so the answer isn't leaked
Answer statistics: Accuracy and time per question and per student, exportable as a report
Classroom Quick Answer: A quick-answer button appears on the student side; whoever presses it first is seen by the teacher as the first to answer
Classroom Polling: Create single-choice or multiple-choice poll questions; students answer and teachers see vote counts in real time
Peer Review: Initiate peer grading among students
Discussion / Chat: Classroom chat room supporting text, emojis, images, files, screenshots. Supports Ctrl+V to paste images and drag-and-drop to send.
Allow / Prohibit Student Discussion: One-click control for students' speaking permission
Group discussion management: Create and manage discussion groups, can switch between group discussion and full-group discussion
Push courseware: Select courseware (ppt/pptx/pdf/doc/docx/txt/image/mp4/avi/mp3/zip/rar/7z) and push with one click to selected student PCs, then auto-open
Courseware resource library: Manage common courseware library for easy repeated distribution
Course objectives and outline: Set the title, objectives, and outline of this lesson, visible to students
Reward Leaderboard: Display student classroom points ranking
Classroom data reports: Collect classroom data such as hand-raising, quick response, voting, and chat
Send Danmaku: Input text and broadcast a scrolling bullet screen to the entire class
Hand raising and help requests: The student toolbar has a one-click hand-raising button; the teacher's end shows the hand-raising status on the student's card; the help request entry can be toggled by the teacher.
AI-powered question generation: Generate questions by knowledge point, question type, and difficulty, and add them to a test paper with one click.
AI grading of subjective questions: Provide scoring and comment suggestions for students' subjective answers, and let the teacher review and finalize the scores.

Online Exams 14 items

Complete chain from question creation, distribution, timing, collection, scoring, to report export. Teachers can see each student's progress in real time.

Graphical question editor: Create and modify questions directly on the teacher interface, no need to pre-write in a table and import.
Import Exam Papers (CSV): Import question banks filled in according to a template at once; the template can be downloaded from the exam management panel.
Five question types: Single choice, multiple choice, true/false, fill-in-the-blank, short answer
Start / End Exam: Tests are distributed to selected students and timing starts; upon completion, the exam stops, papers are collected, and scores are generated.
Exam duration and countdown: Set the exam duration; the student end displays the subject, class, and countdown at the top; when time is up, the exam is automatically submitted and closed.
Real-time progress monitoring of quiz answers: The exam management panel displays in real time each student's answer progress (answered / total questions) and score
Statistics by question accuracy: View the class's correct answer rate for each question, so you know at a glance which question to focus on during review.
Export scores to Excel: Export exam results to a table with one click
Question bank management: Organize questions by subject and topic, with bulk import
Test assembly: Draw questions randomly by rule, or hand-pick from the bank to build a test
Pass mark and submission settings: Set the pass mark, whether early submission is allowed, and whether scores show after submitting
Test review: After submitting, students can review the test and see where they went wrong
In-class quizzes: Short quizzes organized by chapter and question set, with time limits and pass marks; failing students retake automatically, and quizzes can go to specific classes only
Candidate status at a glance: When the exam starts, online students are listed as not started, answering, or submitted; students who reconnect mid-exam get the test resent automatically

File distribution and assignment collection 15 items

One-click distribution of materials to designated locations on each machine; homework collected per student and automatically archived; progress visible per machine; the slow one does not hold back the whole class.

File Distribution: Add files (drag-and-drop supported) → Select target path on student PCs (Desktop / C: / D: / E: / Custom) → Optionally set to auto-run after distribution with parameters.
Batch deployment of multiple drives: Select files from multiple drives and paths on the teacher's PC at once, and batch deliver them to the same target directory on student PCs.
HTTP point-to-multipoint direct transfer: Distribution uses a separate HTTP channel. Broadcasting and distributing simultaneously do not affect each other.
Three Sending Methods: Broadcast, multicast, unicast selectable from a dropdown; choose one based on the computer lab network.
Adaptive rate limiting: AIMD token bucket automatically adjusts the rate based on real-time conditions, and will not use up the full bandwidth and crash the entire class.
Segmented reconciliation and missing block reissue: Check section by section, fill in what's missing, won't get stuck at 99%.
Distribution progress visible per endpoint: A dialog box shows the receiving progress and status of each file on each student machine. Failed items can be resent.
Distribution window can be minimized: Minimize the window; the transfer continues in the background, allowing the teacher to continue lecturing.
Student endpoint receiving list: The student machine pops up a receipt list; click to directly open the received file.
Assignment Collection: Initiate a naming collection task, the student toolbar's 'Submit Assignment' is activated, and the teacher side can view each student's submission status in real time and download.
Archiving by User: Submitted content is archived in separate directories by student ID/name/computer name+IP. The teacher can package it into a ZIP with one click.
Assignment submission content: Students can instantly take screenshots, upload images, or drag in assignment files, and submit them all together.
Configurable homework collection path and naming: The collection directory and file naming conventions can be configured according to the school's archiving habits.
Audio assignments: Students can record audio and submit it as an assignment
Double-click to open assignments: Double-click in the collection panel to open a collected assignment; after packaging, the files are located automatically

Classroom Control 20 items

On the right side is a column of switches. Click once to enable, click again to restore. Red indicates that it is currently under control. Most of them apply to all students.

Blank screens: All screens in the class go black with keyboard and mouse locked; a teacher-set message is displayed on screen. Click to cancel blackout and restore.
Customizable black screen prompt message: Five built-in common prompts available for direct use, or you can write your own.
Three Unlocking Methods: Manual unlock, automatic unlock after a duration (N minutes later), automatic unlock at a specific time (by what time).
Automatic lock for newly connected devices during blackout: Student PCs that start up midway automatically join the black screen and are released simultaneously with the whole class
disable internet access: Cut off student PCs' external network access, one-click restore
Block specific websites: Restrict websites using blacklist or whitelist mode, maintain domain names in a dialog box
Browser keyword blocking: Set keywords; when a student's browser hits one, either close the browser or show a warning; common words are built in and active at startup
Keyword-hit evidence: A screenshot is taken automatically, reporting the keyword, window title, machine, and student; records can be viewed full size and exported as a spreadsheet with thumbnails
Program restrictions (block games/chat tools): Deploy program blacklist, automatically terminate programs that match on student machines, one-click release
Disable USB: Disable USB storage; even if students plug it in, it won't work.
Four-level USB flash drive control: Open / Read-only / Execute disabled / Fully blocked. Select one option based on course needs.
Block new application creation: Lock students to programs already open so they can't start new ones
Offline Lock Screen: Once a student disconnects from the teacher console, the screen automatically locks, preventing cable pulling or exiting to evade control; when reconnected, it automatically unlocks, and the number of locked screens is displayed at the top.
Application and URL monitoring: Monitor which programs students run and which websites they visit, with selectable toggles.
Print Control: Allow or disallow student printing
Note screenshots and help request toggle: Two independent switches determine whether students can press F2 to take notes and whether they can ask for help
Single client offline: Disconnect or restore network for a single student PC without affecting others.
Batch distribution of remote settings: Batch push student-side settings such as desktop background, theme, access channel, volume, and exit password; the background image can be directly selected and pushed.
Protected mode: Stops students from renaming their machine to impersonate the teacher PC
Class isolation: Student PCs from another class can't connect to this one, so several classes in the same lab don't cross over

Anti-deregistration and process protection on student endpoints 9 items

In computer labs, students often have local administrator privileges on their machines, which cannot be blocked at the user level. cc-class comes with a kernel driver for true antivirus/anti-kill, and it's enabled by default after installation.

Kernel-level process anti-kill: Built-in ccprotect kernel driver. Even if students have administrator privileges, they cannot terminate the student client process in Task Manager.
Microsoft officially signed driver: attestation formal signature (not test signature), no need to enable testsigning, no need to disable Secure Boot, no need to install self-signed root certificate
Auto-select driver by system: The installation package includes drivers for both Win7 and Win10. During deployment, the appropriate driver is automatically selected based on the system version.
Enabled by Default: After installation on the student client, it is deployed on boot without needing to configure each machine individually. The teacher's end can also be remotely shut down.
Automatic degradation on missing driver: If the driver is not installed or fails to load, it automatically falls back to user-mode watchdog, while all other functions remain normal.
Protect only own people: Protected programs are built-in whitelist in the driver; other admin programs cannot make the driver shield itself.
Protect cloud desktop clients together: The core process of the vDisk cloud desktop client is also included in the anti-kill whitelist to prevent students from unmanaging.
Process Self-Healing: The background service monitors the student client, automatically restarting it after a crash or shutdown, ensuring uninterrupted classroom control.
Disable protection before upgrade or uninstall: The installation and uninstallation process stops the driver first before moving the process; normal upgrades and uninstalls are not blocked by its own protection.

Monitor and operate on individual student 21 items

In the middle student area, each machine has a card for a quick overview of the entire class. Single-click to select, right-click to bring up the context menu, double-click to directly remote control.

Real-time thumbnail monitoring: Each student card displays a real-time thumbnail of the student's screen and marks the status: online, hand raised, or presenting.
Adjustable card size: The "Zoom In/Out" at the bottom adjusts card size between 80%–160%. The computer lab projector and 4K all-in-one are adjusted separately, and settings are remembered.
Two arrangement methods: Default sorted by seat (IP), can switch to alphabetical order A→Z or reverse Z→A with one click.
Search from the top bar: The top search bar can search for functions and computer names, quickly locating when there are many machines.
Group Teaching: Divide students into different groups; many operations can be applied only to a specific group.
Remote Control: Double-click a student card to open a remote control window, take over the student's mouse and keyboard, and perform operations or demonstrations on their behalf.
Instant discussion: One-on-one chat with a specific student
Capture current screen: Save the student's current screen as an image in 'Documents / Classroom Snapshots' for evidence or as an example.
Set as / Cancel Group Leader: One group leader per group; setting a new one replaces the old, shown right on the card
Classroom evaluation: add/subtract points: 6 positive items (e.g., active participation +1, max +3), 4 negative items (e.g., distracted −1). Customizable with +N / −N.
Start / Cancel Demonstration: Show the student's screen to the whole class, or stop the demonstration
Cancel hand-raising: Clear the student's hand-raising status
Clear offline computers: One-click clear offline cards, after replacing machines in the computer lab, the list will not retain old records
Select target before operation: All actions targeting computers require selecting a machine or group first. If none selected, a confirmation dialog pops up to prevent accidentally affecting the entire class.
Bottom status bar: Current teaching channel and online/total stations at a glance
End with one click from status icons: Cards show small icons by status (broadcast, voice, blackout, internet blocked, group control, exam, hand raised, and more); click one to end it
In-progress activity bar: Features in progress are listed above the list; end each one individually or all at once
Drag to change groups: Drag a student card to another group to move it; selected PCs can be dragged together
Easier selection: Selected machines are clearly highlighted, with Ctrl multi-select, Shift range select, and drag select; right-click runs toolbar features directly on all selected PCs
Monitoring Management: Monitor student screens in multiple splits at once
Hardware monitoring: Inventory student PC hardware and view resource usage

Check-in, attendance, and classes 6 items

One click per class session; who came, which machine they used, and when they arrived, all recorded and exportable.

Related pages:University teaching

start check-in: Click 'Start Check-in' and enter the class name for this lesson; the student client immediately pops up a full-screen check-in window.
Student fill-in items: Name, class, student ID; filled once and remembered, automatically resubmitted on reconnection
Sign-in sheet fields: Time, student ID, name, computer name, MAC, and IP are displayed in real time on the check-in information tab.
Export to Excel: One-click export of attendance sheet for this session
Historical sign-in sessions: Save and view attendance records of previous sessions.
class management: Create or switch class names, group students by class for easy attendance and statistics; the selection is remembered.

Lab sign-in and teaching data 10 items

Students sign in to use PCs and teachers sign in to teach; usage records and teaching data are stored on the server, so it all carries over when changing rooms or machines.

Related pages:University teaching

Lab sign-in: Students must sign in before they can use a student PC
Workstation Usage Logs: Search and export usage records by student ID, class, and date
Shared sign-in roster: One roster for the whole school, so students can sign in regardless of teacher or machine
Self-registration: Students can register their own sign-in accounts
Roster management: Sort and filter the roster by class, with bulk import and export
Teacher sign-in: Teaching data is stored per teacher; sign-in and channel selection are on one screen, and the last account is remembered
QR code sign-in: The teacher app supports sign-in by scanning a QR code with a phone
Teaching Data Kept on the Server: Teacher accounts, courseware, assignments, and grades are stored on the server and retrieved automatically when signing in on another machine
Scheduled automatic backup: Teaching data is backed up to the server at intervals during class
Students check grades: After signing in, students can see past in-class quiz scores

Remote commands and power 8 items

System-level remote operations; irreversible actions such as shutdown, restart, and kill process require selecting the target machine first, then a second confirmation.

Related pages:Lab operations management

Launch application: Select from the preset list (Notepad, Paint, Calculator, Command Prompt, etc.) for remote execution, or add custom program paths and parameters.
Open Webpage: Enter a URL, uniformly open it in the browsers of selected student PCs
Manage applications: View running processes on student PCs and terminate them
Close specific processes: Enter process names to batch terminate, e.g., chrome.exe
Close all desktop applications: One-click to close all desktop programs on student computers for quick cleanup
Remote power on (Wake-on-LAN): Send WoL magic packet to offline machines to wake them up; requires motherboard and network card support
Shutdown / Restart: Shut down or restart the selected student computers, with a confirmation prompt before execution
Remote command line: Send commands directly to selected student PCs and view the output from each

Cloud desktop collaboration and network parameter distribution 8 items

When used with vDisk cloud desktop, the teacher endpoint also serves as the network configuration console for the computer lab: it broadcasts to discover endpoints, and deploys the entire set of network parameters by MAC address in batches, regardless of whether the current IP of the endpoint is correct.

Broadcast discovery of endpoints: One-click broadcast scan, listing all cloud desktop endpoints in the LAN along with computer name, MAC, and current IP in a table.
Deploy by MAC address: Configuration delivered via MAC, without depending on whether the current IP of the endpoint is correct or on the same subnet as the teacher's PC.
Batch distribute network parameters: Fill in the server IP, start IP, subnet mask, gateway, and DNS once, apply to all endpoints, and automatically assign IP addresses in sequence.
Endpoint password verification: Verify the endpoint password before deployment. If the password is incorrect, it will not be written, to avoid misconfiguration to other classrooms.
Take effect immediately and persist: Parameters take effect immediately after writing to the endpoint and are retained, no need to restart or manually adjust each device
Per-Device Status Echo: The table displays results for each PC: success, password verification failure, driver read/write failure, no cloud desktop driver, etc.
Can recover even if network configuration is messed up: Scenarios where conventional software cannot connect to the endpoint due to incorrect IP configuration or unreachable network segment can still be fixed in batches.
Cloud desktop local information settings: Remotely set the local machine information of the cloud desktop endpoint, and deploy network parameters through the same entry point.

Student endpoint (zero-operation design) 8 items

The student client is designed so that 'students do nothing': auto-run on boot, auto-find the teacher's PC, auto-reconnect on disconnect.

Related pages:Linux teaching software

Zero-operation automatic online: Starts automatically on boot, connects automatically, students barely notice its presence
Auto-detect teacher's computer: The teacher end broadcasts a beacon every second, and the student end listens. When the channel matches, they connect automatically. No need to manually enter the teacher's IP throughout.
Automatic reporting upon going online: Once connected, it automatically reports the local hostname, login username, and MAC address, and then appears in the teacher's student list.
Auto-reconnect on disconnection: Reconnect to the last successfully connected teacher PC every 3 seconds, with unlimited retries; last teacher PC info is saved to disk, and it attempts to reconnect on startup.
Top auto-hide toolbar: Move the mouse to the top edge of the screen to evoke, including connection status, hand-raising, help request, homework submission, discussion
Toolbar slide in/out: On Windows, the toolbar slides out and back from the screen edge, no flickering or jumping; can be dragged to snap to another edge.
Single Instance Mutex: Global mutual exclusion across users prevents two student clients from running on the same machine and conflicting.
Auto Exit on Wrong Installation: If the student client is accidentally installed on the teacher's machine, it will self-detect and exit, avoiding role conflict.

Transmission and image quality engineering 12 items

Dozens of machines in a lab receiving screens simultaneously—whether it lags depends entirely on the transmission layer. Below are the specific measures already implemented in the product, not just adjectives.

Related pages:Block-Level Streaming Boot

Adaptive frame rate and quality (QoS): Automatically adjust between frame rate and clarity based on real-time packet loss and backlog; when network is poor, prioritize smoothness.
Motion-adaptive video quality grading: For fast-changing areas, reduce quality to ensure smoothness; for static areas, maintain clarity so text is readable and video is not blurry.
CRC32 hardware hash differencing: Calculate hash block by block using hardware instructions, only send the actually changed blocks; static images consume almost no bandwidth.
Screen capture and encoding dual-stage pipeline: Capturing the next frame overlaps with encoding the current frame, resulting in more stable frame output on the teacher end.
libjpeg-turbo direct encoding/decoding: Teacher-side encoding and student-side decoding both bypass the common image library pipeline, allowing the same machine to deliver a few more frames.
Parallel decoding of multiple tiles: The client uses a thread pool to decode multiple screens simultaneously, so even older student PCs with low specifications can keep up.
X11 SHM double-buffered zero-copy: On Linux, screen capture uses shared-memory double buffering instead of deep-copying the whole screen every frame, noticeably lowering load
Lightweight XOR FEC: Every 4 data fragments come with 1 parity fragment; if one packet is lost, it can be recovered without retransmission, reducing screen tearing.
AIMD adaptive transmission rate: Fast queuing on gigabit networks, automatic convergence on 100-megabit networks; won't flood and bring down the entire computer lab
UDP send independent thread: Packet sending does not block the UI thread; during broadcast, the teacher's interface remains responsive.
Keyframe TCP fallback: The first frame and key frames of the broadcast use a reliable channel, so students will not experience a black screen or long wait for the initial image.
Keep-alive during idle period: No large black blocks, corruption, or ghosting even when the screen doesn't change for a long time

Deployment, role determination, and runtime environment 21 items

One installation package deployed to all machines. After installation, the software determines which machine is the teacher's and which is the student's based on the computer name, so administrators don't need to perform different operations on each machine.

One installer for all: The same installation package is deployed to all machines, no need to distinguish between teacher version and student version, and no need to select specific machines.
Automatic role assignment by computer name: Names containing teacher / jiaoshi / laoshi / laoshi, or with -t, _t, tea teacher marker segments, are identified as teacher machines; the rest are student machines.
No misjudgment: Uses independent marker segments for matching; names like -test, team, host-time will not be mistakenly identified as teacher machines.
Cloud desktop computer name priority: The cloud desktop environment uses the cloud desktop computer name issued by the platform, which takes precedence over the OS hostname.
Consistent judgment across three endpoints: Teacher console, student console, and installer all have identical judgment logic, so the three sides never produce conflicting results
Automatic desktop icon processing: Automatically create or clean up desktop shortcuts based on roles; student machines intentionally do not place icons by design. On Linux, automatically set as trusted to avoid untrusted launcher prompts.
Rename to change role: After changing the computer name, just restart. The daemon automatically re-evaluates the role and rebuilds the icons without reinstallation.
Windows installation: Windows 10 / 11 64-bit, the installer automatically configures the firewall to allow required ports.
Linux installation: Ubuntu 20.04 / 22.04 / 24.04 and other Linux distributions, with online and offline .deb packages and systemd auto-start
Multi-Architecture Coverage: x86_64, ARM64, and loongarch64 (old-world ABI)
Offline Installation: The main program installs even without an internet package source in the lab, and missing system components are listed one by one with their impact and how to add them
Automatic student app upgrades: Import the upgrade package in the teacher app, and student PCs upgrade automatically when they connect, with no per-PC installs
Role prompt during installation: During installation it explains whether this PC installs as teacher or student, and how to name the teacher PC
Automatic firewall rules: Opens the needed ports in Windows Firewall and the Linux system firewall automatically during installation
Cross-platform hybrid networking: Teacher and student apps on Windows and Linux can be mixed, with broadcast, monitoring, group control, takeover, and file distribution all working the same
Xorg Session Auto Configuration: The installer automatically sets WaylandEnable=false to avoid black screenshots and broken keyboard/mouse injection under Wayland
Teaching channels 1–100: Multiple classes in the same computer lab use separate channels simultaneously without interference. Selecting an occupied channel shows a conflict warning.
Fix ports and allow traffic: Broadcast uses UDP 11100, control uses TCP 11100–11105; just allow these ports in the computer lab network.
Multilingual interface: Automatically switches between Simplified Chinese, Traditional Chinese, English, Japanese, Korean, German, French, Spanish, and Russian interfaces following the system language, with identical button positions.
Student PC list access: Export or import the current student PC list as JSON, quickly restore after replacing machines in a fixed computer lab.
Trial and licensing: Self-service QR code registration for trial, can be extended three times, no limit on points; long-term license uses machine code on the interface to exchange for license code

All-Platform Classroom & Screen Broadcast Softwarecc-class Cross-Platform Interactive Classroom

One software, two roles

Screen Broadcast

Student Demonstration

Voice Teaching

Network Cinema

Screen Watching

Group Control

QR code live stream (no client needed)

Prevent student endpoint disconnection

Remote Takeover & Control

Distribute materials / collect and return assignments

Batch deployment of multiple drives

One-Click Screen Blackout & Silence

Check-In & Attendance

Online Messages

Remote commands / power

Screen Broadcast and Teaching Demonstration 27 items

Terminal group control (one-to-many synchronous operation) 12 items

Scan to live stream · watch without client 9 items

Voice teaching and live classroom captions 10 items

Classroom Interaction 18 items

Online Exams 14 items

File distribution and assignment collection 15 items

Classroom Control 20 items

Anti-deregistration and process protection on student endpoints 9 items

Monitor and operate on individual student 21 items

Check-in, attendance, and classes 6 items

Lab sign-in and teaching data 10 items

Remote commands and power 8 items

Cloud desktop collaboration and network parameter distribution 8 items

Student endpoint (zero-operation design) 8 items

Transmission and image quality engineering 12 items

Deployment, role determination, and runtime environment 21 items

UDP Broadcast Discovery

Efficient TCP transmission

Automatic reconnect

Crash Recovery

Low-Latency Transmission

Cross-Platform Support

Adaptive quality and anti-packet-loss

Kernel-level process protection

University · K-12 computer labs

Video · Demonstration · Interaction

Computer-based exams · Proctoring

In-house training · Skills training

Linux Classroom Management Software

Linux screen broadcasting software

Linux teaching software

Comprehensive Solution

Try the cc-class interactive electronic classroom software now

All-Platform Classroom & Screen Broadcast Software
cc-class Cross-Platform Interactive Classroom