Where can I find a list of math textbooks used in school for grades k-12 in the US?

Question

I need a list of the ten or so most popular math textbooks for each grade. I've tried searching amazon, but it's hard to find the books that are actually used by schools.

Answer 1

Here is a company that digitizes commonly used textbooks for instructional use. They might be able to point you in the correct direction:

http://www.academy123.com/en-US/contact_us.htm