3-digit numbers are tricky!
For the past several weeks, our kindergartners have been playing with 2-digit numbers: they made numbers out of base-10 blocks, wrote them on the board, translated between the two representations,...
View Article3-digit numbers are tricky! Part II
This is a follow-up post to this one, about introducing 3-digit numbers to kindergartners. I start this lesson by asking the students to come up to the board one by one and write down consecutive...
View ArticleSecret 3-digit numbers
For the past two weeks, in my first grade math class, we had been playing with 3-digit numbers. Many of the students in this class are the same ones that participated in the lessons described in the...
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