Learning beyond the school textbook
Practice that knows what you already understand — and only asks you about what you don't.
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Coming soonChinese Language·Science·Humanities
Why parents can trust it
The answers are computed, not guessed
Every question is generated from a template whose answer is worked out in code, then checked again by a second, independently written implementation. No language model decides what is correct.
A wrong answer tells you why
Each wrong option matches a real mistake — adding the denominators, moving the decimal point the wrong way — so the feedback names the misunderstanding instead of just marking a cross.
You can flag a bad question
If something looks wrong, say so. Three independent reports take a question out of circulation automatically, within a minute, without waiting for anyone to read them.