First, take a 8.5 x 11 sheet of copy paper and place it in the landscape position (wider than tall). Fold in about 1-1.5 inches on both sides. Next, while the sides are folded in, fold the entire paper in half both ways (lengthwise and width-wise) I found the template for this foldable a while ago and just hadn't before used it. Now that I have use it, I'm trying to figure out where else I can use it! (funny thing is I didn't even realize it was for matrices until I wrote the blog posting).

Here are 2 versions of the front of the foldable I did. I like that the foldable has 4 pages within, each one having a little pocket to hold something

The RED CLOCK thing I did was a mnemonic I did to try and help the students remember that in defining the dimension of a matrix that it does ROWS and then COLUMNS

I told the students to make the time a number that meant something to them. We just started a new trimester and I only know about 25-30% of the students from last trimester. This gives me a way of connecting with a new student and the students a way of personalizing the foldable.

Next, here are pages 1-2. I would like to point out that I had students label each part as one would label the elements of a matrix (a (sub) 11, a (sub) 21, etc.

As we did the foldable I didn't give any instruction on how to perform any of the operations. We put the foldables aside and did examples of adding, subtracting and multiplying by a scalar.

For homework they were to write instructions on the pages a (sub) 12 [adding matrices] a (sub) 13 [subtracting matrices] and a (sub) 14 [multiplication by a scalar] as well as make up 4 addition, 4 subtraction and 4 multiplication by a scalar problems - on half-index cards, which fit wonderfully in the pockets. Students will quiz their partners as I check the assignment on Monday.