We have been using Horizons Math for two years now and my son told me he wanted to use it again next year! The lessons are short, colorful, and interesting. The workbook goes through new material in such a way that there's lots of practice to allow the child time to grasp a concept, but does it without being too repetative. (Lessons are mostly two pages long.) The teacher handbook is useful for tips on teaching and ideas for more hands-on learning. It's a bit lengthy and bulky for me, but others might like the thoroughness of it. Also, the extra practice sheets that can be copied and used are good, but might be best used only if extra practice is needed. All in all, Horizons math has been great and we will continue using it!
This is a wonderfully bright and interactive workbook. My daughter appreciated the pictures and colors. Math is her least favorite subject and these dress-ups helped encourage her. However, I have some issues with this curriculum. For one thing, if you are to simply walk your child through the workbooks, which I did, he or she will not get enough concrete practice with addition/subtraction facts/families. My daughter is doing great in every other area, but the workbooks are very weak in developing this necessary knowledge. When they finally get around to asking her what 16-7 is she has no idea and cannot do this without counters to help. Be prepared as a teacher to incorporate a lot of drill on your own. The teacher's editions do tell you to review the fact families with the children, but do not provide you with the resources to do it. I love the range of material presented in these books and the built in daily review, but supplementary materials will be necessary to teach effectively, in my opinion.