Have you tried a google search? I found a lot of stuff.

Reading comprehension abilities of children with Attention-Deficit/Hyperactivity Disorder

http://jad.sagepub.com/cgi/content/abstract/1/3/173

A. L. Trout, T. Ortiz Lienemann, R. Reid, and M. H. Epstein
A Review of Non-Medication Interventions to Improve the Academic Performance of Children and Youth With ADHD
Remedial and Special Education, August 1, 2007; 28(4): 207 - 226.
http://rse.sagepub.com/cgi/reprint/28/4/207

Language Disorders and ADHD

http://www.addiss.co.uk/languagedisorders.htm