The Maine Mastery Learning Consortium, composed of sixteen school districts, was formed because it was learned that the money and time spent in staff development without follow-up rarely resulted in significant classroom change or successful classroom implementation. This document reports on the first three months of a project designed to provide ongoing classroom assistance to teachers implementing a complex program. The Exemplary Center for Reading Instruction (ECRI), a validated mastery learning program, was used, requiring three one-week sessions for teachers. A fee schedule based on pupil enrollment paid the salary of the two trainers, and the school districts paid the travel and per diem costs. The trainers spent from three to 25 days on site, offering several activities: content demonstrations, observations, conferences, mini-workshops, awareness sessions, and team teaching. Difficulties in scheduling and in trainer burnout are noted. Appendices contain a sample trainer schedule, follow-up checklists, and an onsite assessment form. (FG)