The classroom tools are the most-used things I've built, and there are now enough of them that "here's the list" isn't very helpful — a teacher doesn't want an alphabetical dump, they want the right tool for the next five minutes. So here's the whole set organised by the moment in a lesson you'd actually reach for it. Everything is free, needs no account, runs entirely in the browser, and has an ad-free fullscreen mode for the smartboard.
Starting the lesson
Get the room settled and signal that we've begun. The classroom timer is the plain visual countdown; the classroom screen is the all-in-one dashboard with the timer, date, a picker and more widgets on one board. For a register-adjacent bit of joy, the classroom birthday chart generator prints a wall chart of everyone's birthday.
Picking and grouping
The "no hands up" family. The random name picker draws a student fairly so cold-calling never looks like you singling someone out; the random team picker splits the class into balanced groups; the spin the wheel decision wheel and the yes or no wheel handle the "let the wheel decide" moments. For pure chance there's a random number generator, a dice roller and a coin flip.
Timing and transitions
Keep the day moving. The exam clock shows official start/finish times with extra-time rows (and now runs past midnight); the station rotation timer runs a carousel of activities with a walk-between countdown; the brain break generator throws up a quick movement break when the room's energy dips.
Behaviour and noise
Hand the monitoring to the class. The classroom noise meter turns the room's volume into a visual the class self-regulates against; the classroom traffic light and voice level chart name each zone ("silent," "partner voice," "group voice"); and the classroom scoreboard keeps team points for the short, sparing bursts the research actually supports.
Reading and spelling
The reading fluency timer times a passage and works out words-per-minute; the reading level converter translates between Lexile, grade level and the other scales; the reading log generator prints a home-reading record; and the spelling test practice tool reads a word list aloud for self-testing (a student once won her spelling bee with it, which remains the nicest email I've had).
Maths and quick practice
The multiplication timed test and addition timed test are the classic fluency drills; the test grade calculator turns "23 out of 30" into a percentage and grade in one tap; and the locker combination practice tool helps younger students rehearse a combination lock before the first day of middle school.
Seating, jobs and special days
The classroom seating chart generator lays out desks (rows, groups, a circle, or exam spacing) and the classroom jobs chart generator fairly rotates classroom responsibilities. For one-off events there's the QR code treasure hunt generator and the escape room cipher generator with its companion cipher decoder.
The whole set
That's the tour. They all live in the classroom tools hub, and if you're evaluating them for a whole school the privacy specifics are on the for-schools page — nothing installs, nobody logs in, and no student data leaves the device. If there's a classroom tool you wish existed, tell me; a good chunk of this list started as an email from a teacher.