Equivalent ratios in motion
A richer animation game for proportional reasoning: tune two streams, launch the reactor, and watch the tokens form repeated ratio batches. The reactor only locks when the ratio and the total both match.
An equivalent ratio is the same recipe served in different batch sizes. The reactor here pulls two streams in a fixed ratio and only locks when both the ratio and the total match — so equivalence becomes a pattern you can launch and watch.
Aligned with CCSS 6.RP.A.3 (use ratio reasoning to solve real-world problems).
Animated ratio game
Build an equivalent ratio, fill the target total, then launch the moving streams.
Ratio and percent model
Ratio Reactor Relay is built for students who need multiplicative comparison before cross-multiplication or percent shortcuts. It gives the page a clear search purpose: learn the model, manipulate it, then continue into the matching grade-level practice.
Ratio Reactor Relay helps when a student can copy a procedure but cannot explain why it works. The demo slows the idea down into a visible model before sending the learner to guided missions.
Learning goals
How to play
Continue with guided practice
Two ratios are equivalent when one is a whole-number scaling of the other. 2:3 and 6:9 are equivalent because both mean "two of A for every three of B."
A correct ratio can still under- or over-fill the tank. 2:3 is the right shape, but if the target is 15 units, you need exactly three full batches: 6:9. The reactor tests both checks at once.
a:b is equivalent to c:d when a × d equals b × c. The animation lights up both products and locks when they match.
Grade 6, aligned with CCSS 6.RP.A.3. Useful as a warm-up for proportional reasoning in Grade 7.
