I *think* I've narrowed it our K math options down to Miquon or Singapore. I'd really able to be able to look at both, but it looks like I'd need to buy both in order to do that.
I'm looking for a program that (a) teaches the "why" of math from the beginning and (b) is relatively easy for the teacher to use. DD (5.5) is already great at doing mental math.
I know Miquon teaches the "why" but can be intensive for the teacher and/or confusing.
The simplicity of Singapore is very appealing, but I'm not sure it teaches conceptually as well as Miquon.
Advice/experience from those who have used one or the other or both?