Many studies continually report the results of the Direct Instruction programs. Below are some recent references that are specific to our work.
Grossen, B. (in press). Success of a Direct Instruction Model at a Secondary Level School with High-Risk Students. Reading and Writing Quarterly. (ask for a copy)
Grossen, B. (2002). The BIG Accommodation: The Direct Instruction Model for Secondary Schools. Journal of Education for Students Placed At Risk, 7(2). 241-263.