Research into the effects of Extra Lesson™ on 15 students with learning difficulties showed that students improved on average by 22 months in reading accuracy and 23 months in reading comprehension after 7 months in the program. (M.Ed Thesis, M. Judd 1997.) ADD and ADHD diagnosed Extra Lesson™ students have shown decreases in behaviours such as inattention, hyperactivity and impulsivity and all made substantial academic gains after 20 weeks. (M.Ed. Thesis, L. Craig 2001.)