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When | What | Who | Comment |
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13 seconds ago | dong a shin | Removed Take shapes, lines, and letters from the list. | |
2 minutes ago | dong a shin | Added Figuring to the list. | |
3 minutes ago | dong a shin | Added The giant golden book of mathematics to the list. | |
4 minutes ago | dong a shin | Added How to solve it to the list. | |
9 minutes ago | dong a shin | Added Number sense to the list. |