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- Site news · 18 August 2026
This site is back online after ten years
The K-12 Assessment Center published quizzes and reviews here from 2003. It went quiet, and the addresses rotted....
- For parents · 18 August 2026
Why your child's subtraction looks nothing like yours
Partial differences, trade-first and counting up all reach the same answer as the borrowing you were taught. What...
- Site news · 18 August 2026
Ten quizzes, and why the wrong answers are chosen carefully
The quizzes are live. The arithmetic questions are generated so the right answer is provably right, and every wrong...
- Teaching · 18 August 2026
Estimation catches more mistakes than checking twice
Rechecking a calculation tends to repeat the original error. A rough estimate made before the calculation catches the...
- For parents · 18 August 2026
How to use a method page in a fifteen minute homework session
A practical order for the evening: find the question, read the worked example together, let them try one alone, then...
- For parents · 18 August 2026
When a child says they are bad at maths
The sentence is usually about one specific gap that was never closed, not about ability. Finding the gap is more...
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