Don't use textbooks from China since the focus is different from

those in USA. You can find standard textbooks in USA from your daughter's school or school district.

For first and second grades, they haven't learned multiplication or division yet. But they learned measurement and data, which are most lilely different from the textbook in China. In measurement and data, students need to know money and time, length in customary units, length in metric units, and data analysis (using data and graphs to solve problems).

There are many online resources available (most likely your daughter's school provides some of them to students for free). You can also try out Beestar (http://beestar.org/index.jsp), math is free, $20 for each subject for one semester. They also have practice tests for gifted students. You have freedom to choose the appropriate grade level for your daughter.

I believe that your daughter will succeed no matter she is in the enrichment program or not.