I wanted to add to my post about the RightStart curriculum……
We use the Family Math books alongside of this curriculum, not to supplement it (because it doesn’t need supplementing) but just to change things up a bit for the little ones since we have started formal math with my 5 yr old. The fun activities in Family Math teach math concepts in a very fun and concrete way. The books in the series are: Family Math for Young Children: Comparing by Grace Coates, Family Math II by Grace Coates, and Family Math by Jean Stenmark. I got all of mine used from Amazon or homeschool classifieds for fairly cheap. I am working on an expanded table of contents for these books so if you are interested in those just message me.