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d32d98d3f6
Full lesson audit (grades 3-12): 167 lessons rewritten for wrong or missing facts (terminology, wrong answers, incomplete/ambiguous prompts), 115 final answers added, 11 figures rebuilt and 6 removed to match the new text
673a9e7e39
Lessons that depended on a missing figure or table now carry their own data (15 rewritten), figures added for 5; fixes wrong answers in 3638 and 3769
1fe453095f
Geometry and measurement lessons: figures for the remaining drawable lessons (shapes without invented numbers), fraction bars and number lines for pure-arithmetic lessons