This year-long study examined the effects of classroom-based follow-up assistance provided for teachers trained to implement Cooperative Integrated Reading and Composition (CIRC) (Stevens, Slavin, Madden & Farnish, 1987), a research-based reading and language arts program. The study used a non-equivalent control group design to examine: (1) the effects of providing follow-up assistance to teachers trained in CIRC on teachers' reported use of CIRC, on selected student behaviors, and on reading achievement; and (2) the effects of CIRC on reading achievement.