We are finishing up first grade Saxon math and I already have been using Math U See simultaneously. I'm still somewhat torn about Math U See. I like it for a lot of reasons. I like the manipulatives and the way that concepts are explained. I like the video although it is pretty dry for the younger kids. It does the job though. My kids watch it so it really isn't a big negative for me. So far the big difference I can see between it and Saxon is that Saxon includes a lot of review in every single lesson. Math U See does not cover the standards at the same time as a lot of other math programs do. Because of that I will continue to use another program at the same time. My daughter knows what to expect with Saxon and does well with it so I am going to continue to use it. We also use a Singapore Math workbook. She is finishing up level 1A which says it is appropriate for students in 2nd grade.
Today I printed this addition worksheet to help practice adding within 0-10 with a missing addend. I also like this addition exercise where the student has to add 3 addends. Students are instructed to add those in the brackets first (which all add up to 10 by the way) and then add that with the final number. This was great practice for making 10.
For something different try Fact Monster. Basically glorified online math flashcards. Students try to get as many stars (correct answers) in a row as they can.