We are in D now and honestly I have kinda of annoyed at the amount of review. We didn't take a break but went right into D from C which might be part of the problem but its alot of review. We are on lesson 19 and they are back to having him Skip count by 4's and they seem to be working on the 4 times tables again. Some of the fraction and time stuff has been interesting but I look ahead and it looks like they are going back over subtraction strategies too.