## Decanomial Square

Posted on March 22nd, 2011, by Trina

1. Ashley Says:

how much time did that take?!? And what is the purpose?

2. Amy Says:

I like it! Were you proctoring a test? Or do you have some project planned??

3. Trina Says:

I got home late last night, exhausted from a very long day, physically and emotionally. This was the only picture I’d taken yesterday, and it was easier to post that than to come up with something else to take a picture of at bedtime.

I observed in both kids’ classrooms yesterday morning, and this is what Gosling did while I was there. It’s a tactile representation of a polynomial mathematical expression containing 10 terms. The squares go diagonally from the red 1×1 to the gold 10×10. It’s basically a visual times table for 1-10. The colors correspond with other materials in the classroom (he told me 1 is always red, 10 is always gold, 7 is always white, etc), and the sizes align with other manipulatives they use daily. Later, they’ll do a similar project with graph paper and see how many squares are contained in each piece, and that will be another reinforcement of the multiplication table.