In her book How Children Learn Number Concepts*, Kathy Richardson devotes an entire chapter to composing and decomposing numbers. It may surprise you that the title of the chapter is Understanding Addition and Subtraction: Parts of Numbers. This quote sums it up...
After spending several weeks exploring number bonds, this week I’ve been working with my firsties on composing and decomposing 5. This has been such a fun week as we used three highly engaging activities to practice combinations. On Friday, I asked the kiddos if...
I’ve been working with my firsties on composing and decomposing the numbers 3, 4, and 5. Last week, I used number bond cards and manipulatives–linking cubes and ten-frames–to introduce the idea of number bonds. Read more about that here. Over the...
Last week I blogged about number bonds and part/whole thinking, something I’ll be working with my Firsties on after the break. I’ve been thinking through how I want the lessons to go in my head. This is going to be my introductory lesson the first day...
I’ve been working on place value with my firsties, but when we get back after the winter break, I want to do some work on composing and decomposing numbers to 10. This is technically a Kindergarten skill, but remember that I work with RTI kiddos. Understanding...
