ESLflex Virtual Classroom
A browser-based virtual classroom for live English lessons with video, chat and a shared whiteboard.
- 8Live participants per class
- Sub-secondWhiteboard sync
- +40%Code reusability
What needed fixing
A legacy C# desktop classroom limited reach and was costly to maintain. Lessons needed to run in any browser, even on the low-bandwidth connections common to remote students.
The solutionWhat we built
We migrated the classroom to a WebRTC web app with live video for up to eight participants, an in-class lesson library, real-time chat and a whiteboard synced over Socket.io.
- Migrated from a C# desktop app to the browser with full feature parity
- Webcam, audio and chat for up to eight participants
- In-session library with worksheets, audio, flashcards and multimedia
- Media tuning for stable video on low-bandwidth connections
- Integrated ERP portal for hotel, HR, finance and academic operations
What changed
Live classes on any device with full feature parity, sub-second whiteboard sync, and 40% more reusable code after a modular refactor.
The Classroom
One live lesson, seen from both sides of the screen.
Teacher view
Question-room library, live camera, lesson materials, and session timer.
Student view
Lesson viewer, live video, in-class chat, and session countdown.
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