I was watching a wonderful video on the Teaching Channel the other day. In it, the teacher was asking the children to solve an addition equation using a strategy other than the traditional algorithm. As I was watching, I noticed that she had "math talk" posters under her white board with scripts to encourage conversations using mathematical language. I took particular notice of 2 of them; one about decomposing a number and one about splitting a number. As the kids shared a strategy, the teacher pointed out that whether the numbers were being decomposed or split. She made the distinction that when you decompose a number, you are breaking it apart into its expanded form and when you are splitting a number you are breaking it apart in any way that makes it easier to work with. The following are some examples of the scripts I saw. The kids would fill in the blanks with the appropriate info:
I think ___________________________ because _____________.
I agree/disagree with _______ because ____________.
I got ________. I used groups of ten. I started with ______. I knew that _____________.
I got ________. I used decomposition. I broke ____ into ____ and _____. Then I __________.
I got ________. I used splitting. I split ____ into ____ and ______. Then I ______.
Be sure to check out the great videos on the Teaching Channel!
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