I like the Zaccaro levels. So far, dd prefers the singapore workbook I got her - I think she just likes workbook format. But anyway, singapore math has brief placement tests on its website that make it relatively easy to figure out where your child fits in terms of levels. I couldn't really get dd to do the test but knowing what she's been up to lately made it easy. Still, as with all other subjects, it seems she's ahead in parts and behind (well, not behind but not as exposed or as advanced) in other parts (e.g. she didn't know much about metric measurement because she's only now seeing that in school, but I got the workbook that goes with her level of multiplication/division. So I guess you could say she has a few little gaps though they're not a big deal).
