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Steer a submarine through the reef and swim into the clam with the right answer.
MathGrades 3–5
Bubble Reef
Steer a submarine through the reef and swim into the clam with the right answer.
- 1Steer your little submarine through the coral reef.
- 2Each giant clam holds a pearl with an answer: swim into the right one for treasure.
- 3Joystick, arrows or WASD to swim; tap an answer to swim to its clam. Mind the jellyfish!
Nothing is saved and nothing is collected. Sign up free to keep your stars, farm, creatures and builds.
About Bubble Reef
Steer a submarine through the reef and swim into the clam with the right answer. Times tables, adding, fractions and more math, at your level.
How to play
- Steer your little submarine through the coral reef.
- Each giant clam holds a pearl with an answer: swim into the right one for treasure.
- Joystick, arrows or WASD to swim; tap an answer to swim to its clam. Mind the jellyfish!
Who it's for
For 5–7, 8–10 and 11–13 year olds. Subjects: math. Pick an age above and the questions match that level.
The free demo runs right in the browser on a computer, tablet or phone, with no download and no sign-up. Nothing is saved and nothing is collected. With a free Eurekami account, every round draws on your child's own skill map, stars are kept, and a parent can see what was practiced.
Games give stars but never change mastery: only first-try answers count as correct, so a child can't guess their way up the skill map.
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