We did Singapore math 1a and 1b along with math u see and won't be continuing either for first grade. The Singapore workbooks are colorful and fun and I like the pages where we talk about concepts, however; for us - my daughter could blow through the worksheets and get the answers right and still not have a real understanding of the concept. She finished the Singapore worksheets way ahead of time, and now we have Math U See left to finish by end of June but I'm not happy with that choice either. We are switching to RighStart for 1st grade. It has heavy parent involvement, but there is a lot less opportunity to skirt thought lessons without truly understanding concepts.
I'm starting FLL and WWE for first grade too. We are also using AAS1 next year, but my daughter is completing AAR1 now and that's another we won't be continuing with. She isn't enjoying the cut and paste anymore. And those activities are what originally took us down the AAR path for the money. For WWE, we are mixing in some Writeshop JR here and there to mix it up. That program is a lot of fun!
Someone mentioned a reading list... From Writing with ease, I chose several of the novels mentioned and am creating worksheets to correlate to WWE's instructions (we are using teacher guide, not workbook), to these works of literature, such as Little House in the Big Woods. I'll probably have them posted on Teachers Pay Teachers by End of June.
We are also using Story of the World. Some great resources that go well with Vol 1 (which we breezed over for kinder but are doing for real in first) are Ancient Science by Jim Weiss, Evan Moore Ancient Civilizations History Pockets, Eat Around the World, and the Usborne Ancient Civilization related texts.
Feel free to PM me - since we are in the same boat with the first grader.
:-)