I am using Singapore Math - Primary Math US Edition 4B (Textbook, Workbook & Home Educator's Manual). I am a first-time homeschooler. We started with Saxon 5/4 but switched to Singapore 3 weeks into 5th grade. We are liking Singapore Math very much. As a side note, my daughter has mild autism. The problems in the Singapore workbook are easy to see and spaced far enough apart on the page that there is room to show her work and it is not visually cluttered - a plus for kids with learning disabilities! There are also lots of easy to understand visual aids and cartoonish pictures that make learning math fun, and that make it easier for a child with reading comprehension issues to 'get it'. (One of our probelms with the cluttered & less-illustrated pages of the Saxon textbook.)Singapore doesn't offer enough drill in my opinion. Cementing basic math facts in their little brains is important to keep them moving along as the math gets more difficult. For this reason I also bought Two-Minute Math Drills (Multiplication/Division & Decimals/Fractions)to supplement my daughter's home-school math curriculum after switching to SM - a big time-saver for me. (I tried typing a few problems on the computer an quickly discovered I didn't have all the right sybols for math problems.) Singapore also offers Intensive Practice supplements which I plan to look into, but haven't yet. I like the fact that you can buy Singapore a semester at a time, which helps spread out the cost for those of us on a budget, and also allows you to start your child in the middle of a grade level if needed. Use Singapore's placement tests to determine this.Anyhow, Singapore is designed for more parent involvement and direct teaching than Saxon(unless you have a kid that is truly a self-teching-schoolworkaholic), but We are having fun with it and she seems to be 'getting it'.