I love breaking the addition combinations into categories. I'm sure many of you do also. Yesterday as I was reviewing the doubles and doubles plus one combinations it occurred to me that my students may not realize exactly what a doubles plus one combination means. I know they've heard of it before in earlier grades but I always just want to make sure they conceptualize what they are learning. I made the following with them and it seemed to really help.
First we folded our papers like a hot dog or vertically and placed the fold to our right. We then started to draw out the doubles facts and wrote the combination that matched it next to it.
I also wanted to let you know that I've created a new product on my Teacher's Notebook store! It's called Rounding Mountain!