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Commit History
29 days ago
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Physics: chapters 1, 2, energy and waves; trailing-zero s.f. marking
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Economics: basic economic problem; markets, demand and supply
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Biology: five more chapters (classification, organisation, movement in and out of cells, biological molecules, human nutrition); exact-precision marking
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Minor content fixes; Cambridge-style multi-select marking; tighter numeric tolerances and precision rules
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Content fixes from independent review (4 critical, 9 major); accept correctly rounded numeric answers
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Add the Claude tutor, idea levels and parent area
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