Lans Cloud

Classroom Screen is a free digital whiteboard for teachers: compose a timer, clock, random name picker, noise meter, scoreboard, traffic light and text widgets onto a single fullscreen board and run the whole lesson from the smartboard. It needs no account and has no paid tier — every widget is also its own fast standalone page, and the fullscreen presentation modes show no ads while you teach.

It's privacy-first and runs entirely in the browser: the noise meter turns room audio into a single number on the device and discards it (nothing is recorded or uploaded), and class lists and settings stay in your browser, never on a server. Works on any modern browser — desktop, tablet or interactive whiteboard — with nothing to install.