This study examines for whom and how Organizational Skills Training-Tier 2 (OST-T2, Nissley-Tsiopinis et al., 2024) works for students in grades 3 to 5 with organization, time management, and planning (OTMP) difficulties. The study: (1) investigates subgroup differences for the effect of OST-T2 on student homework and academic performance at post-intervention (about 14 weeks), short-term (about 22 weeks) and long-term follow-up (about 55 weeks); and (2) examines whether improvements in student…
