We have a much greater understanding of the difficulties children with learning disabilities can experience in math and fortunately, there are many resources available to help teachers to bypass those difficulties. Try these:
You can find information LD Online at www.ldonline.org/ld_indepth/resource-guide.html.
My favorite book for teaching children with math disabilities is Teaching Mathematics to Students with Learning Disabilities by Nancy Bley and Carol Thornton.
As far as particular instructional programs, I like Peggy Stern's Structural Math Series, available from Educators Publishing Service ( 1-800-435-7728 or www.epsbooks.com). I also really like the Strategic Math Series by Susan Peterson Miller and Cecil D. Mercer (available from Edge Enterprises, PO Box 1304 Lawrence, KS 66044).
For older children with learning disabilities who have difficulty with fractions, decimals, and even beginning algebra and geometry, I like the materials from Key Curriculum Press (1-800-995-MATH or www.keypress.com/).
In general, the same systematic, direct instruction that is required to learn how to read and write is also needed to learn math. These techniques will help the student with dyslexia who struggles with math:
"Chunking" new information into small bits so that it can be understood and retained better
Distributed practice of new skills
Opportunities to use manipulative materials to make math concepts and operations clearer
Use of language to "talk through" what your student is doing/learning in math