A federally funded research project investigated the relationship between academic learning time (ALT) and achievement of 43 educable mentally retarded, emotionally disturbed, and learning-disabled students, aged 7-13, in grades 1-5. The project's final report, titled "An Analysis of the Impact of Instructional Time within Different Service…

Observations were conducted to document the active academic responding and academic engagement rates of 122 elementary students (30 learning-disabled, 32 emotionally/behaviorally disturbed, 30 mildly mentally retarded, and 30 self-contained programs. Data were recorded in 10-second intervals for each student over an entire school day. During a…