Fresh new look/Have a poke around and let us know.
Classroom Group Generator

Classroom traffic light for clear behavior signals

Show a giant green, yellow, or red signal so students know exactly when to work together, whisper, or stay silent. No nagging required.

Trusted by 1,000+ teachers worldwide

Classroom Group Generator preview

Traffic light features for clear behavior cues

A giant behavior signal with editable labels, auto-advance, and projector-ready visibility.

Giant three-color signal

A huge green, yellow, or red light that students can read instantly from the back of the room.

Editable state labels

Rename each color to match the activity, like "Group Work", "Whisper", or "Silent", or anything your class uses.

One-tap state switching

Flip between work modes with a single tap so students transition without disruption.

Custom state descriptions

Add a short cue under each label, like "Quiet voices, partner only", so the rule is on screen, not in your repeated reminders.

Optional sound cue

Play a gentle chime when the state changes so students notice without a verbal reminder.

Fullscreen projector mode

Show the signal in fullscreen on a projector or interactive whiteboard for whole-class visibility.

As easy as 1, 2, signal!

Three quick steps to a giant green, yellow, or red behavior signal.

Pick your labels

Keep the defaults or rename each color to match the activity, rule, or vocabulary your class uses.

Tap a color

Start on green, yellow, or red depending on what students should be doing right now.

Present and switch

Project the signal in fullscreen and switch states as the activity changes.

More tools for your classroom

Quick helpers for grouping, seating, timing, picking names, and keeping the lesson moving.

Class groups

Seating charts

Random picker

Timer

Classroom clock

Classroom schedule

Noise monitor

Online dice

Team scoreboard

AI rubric generator

workspace_premiumPro

AI lesson planner

workspace_premiumPro

AI worksheet generator

workspace_premiumPro

AI quiz generator

workspace_premiumPro

Classroom stopwatch

Text widget

Image widget

Video embed

Live poll

QR code

Flashcard generator

workspace_premiumPro

Stickers

workspace_premiumPro

First-then board

Class planner

Simple, affordable pricing

Start free or subscribe for just $2.99/month.

Free plan

Forever free

  • Access to All Core Tools: 10+ classroom essentials, free forever. AI tools available on Pro
  • No Signup Required: Use any of the tools instantly
  • Limited Features: Some features for some tools may be limited
  • Presentation Mode: Big, clear visuals built for school whiteboards and projectors
  • Browser Storage Only: Whiteboards and widget setups saved on this device only
  • Single Device: No cross-device sync for whiteboards
Best value

Pro plan

$2.99/month
  • Everything in Free: Plus all premium benefits
  • 30 AI Credits per Month: Use across every AI tool, including lesson plans, rubrics, worksheets, quizzes, and all future AI generation
  • Unlimited Whiteboard Saving: Save unlimited whiteboards with every tool embedded as a widget, including group generator, seating, lesson plans, rubrics, quizzes, worksheets, and more
  • Multi-Device Access: School computer, laptop, and tablet, all synced
  • Priority Support: Get help when you need it
  • Request New Tools: Request new tools and they will be added within 7 days

Got questions? We have answers!

Can't find what you're looking for? We're here to help.

Is this a noise meter?

No. The traffic light is a behavior signal you control manually. It is not a microphone-driven noise meter. For live volume detection, use the Noise Monitor tool instead.

Can I change what each color means?

Yes. Tap any label and rename it to match your activity, for example "Group Work", "Whisper", "Test Mode", "Silent Reading", or any other vocabulary your class uses.

How do I switch between colors?

Tap the green, yellow, or red bulb and the signal updates instantly. You can also click the housing to cycle through green, yellow, and red.

Can I add a description under each label?

Yes. Each color has its own short description (up to 30 characters), like "Quiet voices, partner only", so students can read the rule without you repeating it.

Does it make a sound when the color changes?

Optional. Turn the sound cue on or off. When on, a gentle chime plays so students notice transitions without a verbal reminder.

Can I run it on a projector?

Yes. Presentation mode opens a fullscreen signal that is big enough to read from the back of a classroom.

How long does each state last?

As long as you want. Tap a color when you want to switch, or click the housing to cycle to the next state.

Does it need the microphone or internet?

Neither. The traffic light is fully manual and runs locally in your browser. No microphone permission is required.

Does it work on tablets?

Yes. Tap targets are large enough for tablets and the signal resizes to fit any screen.

Why should I upgrade to Pro?

Pro unlocks unlimited cloud-saved whiteboards with every tool embedded as a widget, multi-device sync across school computer, laptop, and tablet, priority support, and 30 monthly AI credits that work across the lesson planner, rubric generator, quiz generator, and worksheet generator. You can also request new tools and we ship them within 7 days.