TeacherTray
Free classroom tools

Everything for the board, one click away.

Timers, group makers, a seating chart, a noise meter and a grade calculator. They’re big enough to read from the back row, need no sign-up, and keep student names in your browser.

Quick timer

Opens the classroom timer set to that time. Press Start when you’re ready.

The tools

Each one goes full screen for the projector or TV.

Board toolClassroom timer5:00Big digits for the board, yellow in the last minute, a chime at zero.Board toolVisual timer60-minute faceA color disc that shrinks as time runs out. Drag it to set.Board toolTeam randomizer28 → 7 × 4Fair random groups or partners. Mark absences, keep pairs apart.Board toolSeating chart generatorRows, pairs, tablesA random seating chart with front-row seats and pairs kept apart.Board toolClassroom noise meter70 dBAgroup conversation (ASHA)A meter or traffic light that warns when the room gets too loud.GradingTeacher grade calculator17/20 = 85%a B on the 10-point scalePercent and letter grade, with a printable chart for the whole test.

My classes

Save each class list once. The team randomizer and the seating chart can load it. Lists stay in this browser on this device and are never sent to us.

No classes saved yet. Type a name and paste the list to save your first one.

Where the numbers come from

GradesThe 10-point scale as set in Florida Statutes §1003.437; the College Board’s GPA chart for comparison.
NoiseSound levels from ASHA and NIDCD. The meter itself shows a calibrated relative level, not decibels.
Visual timersVisual supports are an evidence-based practice in UNC’s AFIRM modules.
Fair groupsEvery shuffle uses the browser’s cryptographic random numbers (MDN), so every student has the same chance.

Coming soon

Tools and printables being built next.