Classroom Noise Monitor🐠 Coral Reef 🐠
When the class is quiet, corals bloom and sea creatures come out to play. When it gets too loud, the fish hide, and if it stays loud, the coral starts to bleach!
Class goal: Bloom all nine corals before the lesson ends!
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Sound stays on this computer. Nothing is recorded or sent anywhere.
How Coral Reef works
1. Take the plunge
Pick a lesson length, press Dive In, and allow the microphone. The reef tunes itself to your room's natural background sound.
2. Calm blooms the coral
Quiet focus blooms coral after coral while fish, turtles, and other sea creatures drift in to explore. Nine corals make a full reef, so challenge the class to bring every one to life before the lesson ends.
3. Loud bleaches the reef
If the noise keeps up the fish hide and the coral starts to bleach. Tip: tie the bleaching to a quick science chat about real reefs.
Explore more themes
Quiet Jungle
FREEKeep your class quiet and watch a jungle grow full screen! Trees grow when the classroom is calm and wilt when it gets too loud.
Dino Valley
FREEKeep your class quiet and hatch baby dinosaurs from their eggs! Too much noise wakes the volcano and scares the dinos back into their shells.
Traffic Lights
FREEThe classic traffic light noise monitor, full screen! The light stays green and little cars cruise across town while the class is quiet. Too loud turns it red and jams the traffic.
Bouncy Balls
PROThe classic bouncy balls noise meter, flipped to reward calm! Colorful playground balls bounce while your class stays quiet. Too much noise stops the fun and deflates them.
Pirate Treasure
PROKeep your class quiet and fill a pirate chest with treasure! The ship sails toward the island while the room stays calm, and a storm brews when it gets too loud.
Train Journey
PROKeep your class quiet and ride a steam train across the countryside, station by station! The signal turns red and the train stops when it gets too loud.
Space Launch
PROKeep your class quiet to build, fuel and launch rockets to every planet! The countdown holds when the classroom gets too loud.
Fairy Village
PROKeep your class quiet and light up a fairy village of mushroom houses! Glowing windows and fireflies fill the glade, until the wind blows the lights out.
Castle Builders
PROKeep your class quiet and build a castle stone by stone! The builders stop and the scaffolding shakes when the classroom gets too loud.
Winter Aurora
PROKeep your class quiet to build a snowman and make the northern lights bloom! Too much noise kicks up a blizzard that blows the snow away.
Balloon Journey
PROKeep your class quiet and ride a hot air balloon from the fields to the stars! The balloon sinks when the classroom gets too loud.
Or head back to the classroom noise monitor homepage for the full overview and FAQ.
Coral Reef questions
Is Coral Reef free to use?
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Coral Reef is a Pro theme. Lifetime Pro is a one-time $20 payment that unlocks every theme, unlimited session time, and priority support. You can try the monitor for free first with the Quiet Jungle, Dino Valley, and Traffic Lights themes.
Can the class lose progress in Coral Reef?
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Yes, sustained noise has consequences here. The coral is bleaching if the room stays loud for too long, so students have a real reason to settle down quickly. A few seconds of calm stops the damage.
What age group is Coral Reef best for?
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Coral Reef suits elementary and middle school classes, and it pairs nicely with ocean, biology, or environment units where the bleaching coral sparks real conversations.