I’ve been working with my Firsties on composing and decomposing numbers, and we are currently working on combinations for eight. I decided to take it in a different direction this week and work on decomposing into three parts, so I made a part/whole mat with...
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...
Number bonds help children develop an understanding of part/whole thinking and lead to working flexibly with numbers. Let’s take that idea a step farther and make a case for just how important the concept of composing and decomposing is. According to the CCSSM,...
I think if you asked people to tell you what they know about Singapore Math, many would say, Oh, that’s model drawing. And while that’s one part of it, it really starts much earlier than that with their incredible routines for building number sense. Enter...
I’ve written recently about using dot cards and rekenreks to develop number sense, and today’s post focuses on another great tool–number bracelets. Like dot cards and rekenreks, number bracelets provide concrete practice for number combinations and...
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