Accuracy
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Superior self-study. All 162 code-verified questions, now with three added layers: you rate your confidence before each Check, wrong answers open a targeted correction queue, and a mastery dashboard tracks your progress - all in your browser, no internet grading. Answers appear only after you Check.
Verified bank * 162 questions
Score 0 / 0 * Accuracy -
Question 1 of 0
How sure are you? (this trains your confidence calibration)
Your mastery dashboard
Absolute progress only - no ranking, no comparison to other students. Updates after every Check.
Confidence calibration (Brier)
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Confidence vs. reality
Where your sureness matched what actually happened. The goal is to shrink the Blind spot box — the questions you were sure about but got wrong.
Solid
0
Sure — and right
Blind spot
0
Sure — but wrong
Shaky
0
Unsure — but right
Honest gap
0
Unsure — and wrong
Skills to focus (lowest mastery)
Answer a few questions to see this.
Open misconceptions (correction queue)
None yet - nice.
Where to focus
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Verified 7.RP bank (162) + attempt_schema / brier / error_class / aggregate wired * self-checked in your browser * no runtime API