I also think this program would work well for English Language Learners.

TeachTown®: Basics was designed by a team of autism researchers led by Dr. Christina Whalen, PhD, BCBA-D, Chief Science Officer, who co-founded the company while working at the University of Washington Autism Center. The intervention curriculum addresses early childhood learning standards, and uses prescriptive and adaptive intelligence to deliver direct instruction. At appropriate intervals, children are motivated with games and rewards. Teachers can view progress reports online and receive a monthly email report to track accountability. The program contains over 800 On Computer Lessons and Off Computer Activities, and delivers thousands of concepts in six essential learning domains: Mathematics, Language Development, Language Arts, Adaptive Skills, Cognitive Skills, and Social and Emotion Skills.