Pick a Mode and Depth
Choose Timed or Survival, then Easy, Medium, or Hard. The reef restocks with a new fact.
Read the Plaque
The brass plate shows a ÷ b = . Think how many groups of b fit into a.
Tap the Quotient
Choose the bubble with the missing number. Keys 1, 2, and 3 pick left to right.
Watch the Glow
A correct bubble rings green. A miss flashes the true quotient so the next fact is clearer.
Three Answer Bubbles
Each round shows a fact such as 36 ÷ 9 and three glass bubbles. Only one bubble is the true quotient.
Close Distractors
Wrong bubbles sit next to the real answer (plus or minus one, or a nearby factor) so students cannot guess from size alone.
Three Fact Ranges
Easy uses divisors 2–5. Medium opens 2–9. Hard stretches to 12 × 12 facts.
Timed Dive or Survival
Race 75 seconds, or play with three lives. High scores stay on this device.
Reef Quotients is a fourth-grade division-facts game. A dividend and divisor appear on a plaque (for example 36 ÷ 9 = ). Three bubbles float above with possible quotients. The player taps the bubble that completes the fact. Distractors are nearby numbers, so the round trains recall of the related multiplication fact rather than slow counting.
Builds Fact Fluency
Quick quotient recall is what later long division depends on. Short rounds keep that recall fast.
Uses the Inverse of Multiplication
Students who know 9 × 4 = 36 can flip it to 36 ÷ 9 = 4. The bubbles make that flip a tap, not a worksheet.
Wrong Answers That Teach
Choices like 3 and 5 next to 4 force attention to the exact fact, not a rough estimate.
Works on Touch
No typing. Three large bubbles are easy on a tablet and still playable with 1–3 on a keyboard.
No. Every fact divides evenly. The game is for division facts, not remainder work.
Easy uses divisors 2–5 and quotients 2–8. Medium uses divisors 2–9. Hard uses facts through 12 × 12.
Yes. Press 1, 2, or 3 to pick the left, middle, or right bubble.
The miss ring shows the true quotient. The next round deals a new fact so you can try the inverse again.
Third and fourth grade (about ages 8–10), when students learn division facts with one-digit divisors. Hard is useful for review of the 12s.