Problem solver

Every claim here starts with a solved problem the server graded. The label comes after the work, never before it.

What the national data says

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Start here: one problem

A first name or nickname is all we ask for. No email, no last name, no birthday. For a child under 13, a parent or teacher signs up and sits beside them.

Questions people ask

Why can't I claim it right away?

Because in the national data a claim with nothing behind it does not move anything. Here the claim unlocks after one graded proof and one witness, so the sentence means what it says.

Does it cost anything?

No. There is nothing to buy, and no badge, rank or point can be bought. A purchase never fires a trigger.

What do you collect about my child?

A first name or nickname, a role, a language and, if you choose, a county. No email, no last name, no birthday. For a child under 13 the adult signs up and sits beside them.

Where do the numbers come from?

NSF's High School Longitudinal Study of 2009, published in Science and Engineering Indicators (NSB-2021-1), tables SK12-27, SK12-28 and K12-5.