Free classroom tools that just work on the board
Timers, 3D dice, a spin wheel, name picker, noise meter, whiteboard and more — ready the moment you open them. No sign-up, no ads, nothing to install.
Add OpenClassroomTool to your home screen. It opens full screen and keeps working offline.
Tap Share, then “Add to Home Screen”.
Recently used
Put several tools on one screen
The Classroom Board holds a timer, noise meter, instructions and more side by side — drag, resize and present. Your boards are saved in this browser.
Classroom Timers & Clocks
Countdown timers, a stopwatch, a 3D sand timer, a classroom clock and a lesson agenda.
Classroom Timer
A big countdown with ring, pie or bar display and a friendly alarm.
BoardClassroom Stopwatch
Huge digits to the hundredth, lap times and a sweep-hand dial.
Board3D Sand Timer
A realistic 3D hourglass: flip it and watch the sand run out.
3D BoardClassroom Clock
A big analog clock that teaches: drag the hands, quiz with random times.
BoardLesson Agenda Timer
Your lesson as timed blocks: what’s now, what’s next and minutes left.
BoardRandomizers & Classroom Games
3D dice, coin flip, spin the wheel, random name picker, group maker and scoreboard.
3D Dice Roller
Realistic 3D dice with real physics, dots or numbers and a running total.
3D Board3D Coin Flip
Toss up to five realistic metal coins and keep a heads-or-tails tally.
3D BoardSpin the Wheel
A 3D prize wheel for student names or your own entries, with a ticking flapper.
3D BoardRandom Name Picker
Pick a student fairly with a flipping card or a spinning slot reel.
BoardRandom Group Maker
Shuffle your class into balanced groups and deal them into colored cards.
BoardRandom Number Generator
Big rolling digits for any range, with a no-repeat bingo mode.
BoardClassroom Scoreboard
Big team scores with one-key points, a leader’s crown and a podium.
BoardClassroom Management Tools
Noise meter, traffic light, voice levels, instructions, seating chart, class points and QR codes.
Classroom Noise Meter
A live sound-level gauge with a noise limit, quiet streaks and a gentle alert.
BoardClassroom Traffic Light
A realistic red, yellow and green signal with your own labels.
BoardVoice Level Chart
Show the expected voice level, 0 to 4, with a picture the whole class understands.
BoardClassroom Instructions Board
Big step-by-step instructions the class can follow and tick off.
BoardSeating Chart Maker
Drag desks into your room, seat the class, shuffle and print the plan.
Class Points
One-click points for every student, with a class goal to race toward.
BoardQR Code Maker
Turn any link into a big, scannable QR code for the projector.
BoardInteractive Teaching Aids
Whiteboard, 3D shapes with nets, base-ten blocks, fractions, number line and a 3D globe.
Online Whiteboard
Draw, write and highlight on grid, lined or handwriting paper — or a chalkboard.
Board3D Shapes
Twelve solids to turn, count and unfold into their nets.
3D BoardBase-Ten Blocks
Thousands, hundreds, tens and ones in 3D, with breaking and trading.
3D BoardFraction Tools
A fraction wall, fraction circles, comparisons and equivalent fractions.
BoardInteractive Number Line
Show hops and equations on a number line — whole numbers, negatives, decimals or fractions.
Board3D Globe
Spin a NASA Earth with grid lines, the equator and tropics, and labels.
3D BoardMade for teaching, not for sign-ups
OpenClassroomTool is a free set of classroom tools for teachers who need something on the board right now. Every tool opens instantly, works with a keyboard (press Space to start, roll or spin, and F to present full screen), and is large enough to read from the back of the room.
Class lists you type into the name picker, spin wheel, group maker or seating chart are kept in your browser, with no sign-up and no trackers, and there is nothing for students to log into. Teach several classes? Add each one, then use the class switch at the top of any page: every tool, and your Classroom Board, moves to the class in front of you. Give each class its lesson times and the site can suggest the switch, or make it, when the lesson starts.
Teach on more than one computer? Sign in with Google and your classes, their points and seating plans, and your Boards follow you, with student names encrypted. A classroom code opens a Board on the school computer without signing in there.