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K-2 Math Foundations
Scholar (Ages 13-18)
Even and Odd Numbers
Some numbers are EVEN (they come in pairs) and some are ODD (one always left over). Learn to tell them apart, the simple rule that works every time, and why it matters.
15 min
+15 XP
Adding Three Numbers
When you have three numbers to add, there's more than one way to do it — let's find the easiest!
15 min
+15 XP