Consider contacting your GSSD Math Coach for support with RTI in math. We have some resources that might help, such as an excellent DVD by Paul Riccomini on teaching techniques for students struggling in math (Click here to see the slides that go with the DVD). There are also some books you may like to borrow to study with your RTI team.
Some of the books available are:
There are also books and DVDs on math instruction with manipulatives, differentiating math instruction, and assessment in mathematcis. Contact your math coach email@example.com to access any of these resources and more!