A ratio compares two amounts, like 3 red for every 5 blue. Scale both the same way and it never changes.
Learn by teaching · K-12
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Got it! So if there are 15 red, how many blue, and why?
The method
How it works
Learn it
Play with a live lab, read the primer, watch a quick video. Get the idea first.
Teach it back
Explain it to a friendly AI student. It listens, asks real questions, and scores how well it understood.
Prove it
Unlock the problem bank and show you can use it, from warm-up to core to stretch.
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Every subject, taught with the same teach-it-back method and mapped grade by grade — math runs all the way to Grade 12.
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