Does anybody have a source for basic grade level assessments/requirements?
The Core Knowledge series uses a series of books that tell what you need to know at each grade level up to, I think 8th grade.
State academic requirements are also of use as a guide to minimum standards.
Additionally, there is in Worldbook Encyclopedia a webpage which has a general outline for course of study for k-12. http://www.worldbook.com/wb/Students?curriculum
hope that helps.
I forgot to add http://www.letsgolearn.com/ is an online assessment tool you can use. Tests are administered for a fee, but it is not cost prohibitive.