Both my DS and my DD have skipped a year of EDM without any problems whatsoever. The EDM curriculum is a spiral curriculum, meaning that they cover many of the same topics year after year after year (e.g., fractions), just in ever-increasing complexity. So, if your child is understanding things in a more complex way than students in his or her grade, she is essentially already working at a higher grade level with no instruction. So, for instance, multiplication begins to be covered in first grade with pictures, then in second grade with arrays, then in third grade with memorization and simple facts, and then in fourth grade with double-digit and triple-digit multiplication, and so on. So, from what I've seen, review is built in. Within each year there is a lot of jumping around between topics (angles, calculation, graphs, geometry, etc.), but comparing year to year it's mostly the same subjects in increasing complexity.
Gaps are often mentioned by educators of being of utmost concern, but if your child has high ability test scores and high math acievement scores, any gaps will provide some much needed challenge in the short term and will be easily overcome by the speed with which your child learns.
Last edited by mnmom23; 10/09/11 05:06 PM. Reason: spelling! shouldn't have posted in such a hurry!