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

Screen Broadcast and Teaching Demonstration 21 项

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.

相关页面：Linux Screen Broadcast、Interactive TeachingSolutions

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

On the main interface, click or drag to select the computers and groups to receive; if none selected, it will prompt "Select all N computers and continue" instead of silently broadcasting to the whole class.

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

Broadcast a student's screen to the whole class, while automatically opening a remote control window for the teacher to that student, allowing the teacher to take over at any time.

Live Streaming

Live broadcast of screen + camera + audio, camera overlay as picture-in-picture at bottom right, viewers can switch sources.

Voice broadcast and two-way audio

Broadcast voice to the whole class, and also have real-time conversations with students

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.

Transfer method optional

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.

Terminal group control (one-to-many synchronous operation) 11 项

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.

相关页面：Corporate Training室Solutions

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.

Scan to live stream · watch without client 9 项

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.

相关页面：Multimedia Classroom、

相关页面：Cloud Classroom Management Platform、Interactive Teaching

Random Roll Call

Randomly select a student with a scrolling animation, which is synchronized on the student side; after selection, one-click to broadcast the student's screen to the whole class.

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 8 项

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

相关页面：无纸化Exam、驾考Exam Room

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

File distribution and assignment collection 13 项

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.

相关页面：Universities教学集控、Digital ClassroomSolutions

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 speed 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.

Classroom Control 17 项

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.

相关页面：Data Security与管控、Cloud Classroom Management

Black Screen Silent

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 the student browser hits, it will close the browser or pop up a warning, two options available

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 so they can only use the currently open programs and cannot 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.

Anti-deregistration and process protection on student endpoints 9 项

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.

相关页面：硬件虚拟化与防跟踪

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 15 项

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.

相关页面：Linux Classroom Management Software

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.

Top Search Positioning

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

Assign or unassign a student as group leader

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

Check-in, attendance, and classes 6 项

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

相关页面：Universities教学Scenarios

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.

Remote commands and power 7 项

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

相关页面：机房Operations & Maintenance管理

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

Cloud desktop collaboration and network parameter distribution 8 项

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.

相关页面：DeploymentImplementationGuide、Server Side与endpoint

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 项

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

相关页面：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 项

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.

相关页面：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

Linux screen capture uses shared memory double buffering, no longer deep-copies the entire screen per frame, significantly reducing load on domestic systems

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

Even if the screen remains static for a long time, no large black blocks, screen flickering, or afterimages appear.

Deployment, role determination, and runtime environment 19 项

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.

相关页面：domestic IT stackDomestic Substitution机房、Training RoomFast Delivery

Single 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 / domestic IT stack installation

Ubuntu 20.04 / 22.04 / 24.04 and domestic systems such as UOS and Kylin, providing .deb online and offline installation packages and systemd auto-start on boot.

Domestic IT stack naming package

Separate naming packages for UOS V20 and Kylin V10, directly pick the corresponding one on-site based on the system.

Multi-Architecture Coverage

x86_64 (including Hygon, Zhaoxin), ARM64 (Phytium, Kunpeng), and Loongson loongarch64 old world ABI (corresponding to UOS Loongson edition / Kylin Loongson edition)

Offline Installation

The offline installation package includes dependencies, so it can be installed even if the computer lab has no external network source.

Cross-platform hybrid networking

Windows and domestic OS teacher and student clients can be mixed, broadcast, monitoring, group control, takeover, file distribution functions are consistently available.

Xorg Session Auto Configuration

Installation包自动写入 WaylandEnable=false，避开 Wayland 下截屏Black Screen与键鼠注入失效的坑

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