The theoretical base and practical operation of the Learning Lab, a diagnostic teaching approach with learning disabled students, are described. The program's philosophy is said to be based on child developmental-interactional principles in an integrated intervention approach. The program is explained to feature one-to-one tutorial work, training of tutors and leadership staff, integrated use of an interdisciplinary team, and work with parents and classroom teachers. Also described are the following program aspects: outreach to public schools and adaptation of the model, a research component, and dissemination activities (including development of dissemination and training materials). A case study illustrates the match between tutor (a graduate student) and child. (CL)