I'm currently working with my dd 4 (just turned 4 in Aug.) in Saxon K, and we are about 3/4 of the way through. It is defiantly pre-k'ish....so much that I bought Singapore EarlyBird A & B....We sailed through SM EB A in about a month and we have just started SM EB B. As someone else posted, they do not line up. I personally like both approaches. We do Saxon 2 days a week and Singapore 1 or 2 days a week, depending on our week ;) My dd LOVES Saxon...I think because it's all manipulatives. There is a meeting book that you can get, but I didn't use it. Saxon K has the student "act out" the lesson with the manipulatives. For example, there are 5 bears on the playground, one left and went home. How many bears are left on the playground? The concept introduces the child to subtraction. IMO I think Saxon is great!! :thumbup: As alatexan 68 posted, EB B is closer to Saxon 1 and I agree. I recently purchased Saxon Math 1 and EB B is closer to Saxon 1 in some areas. IHTH!