The Mark Twain School provides a short term individualized educational program for seriously emotionally disturbed students with learning problems in grades 6 through 12 in Montgomery County (Maryland) Public Schools (MCPS). During the 1980-81 school year the Department of Educational Accountability, at the request of the Office of Continuum Education and the Mark Twain School, conducted a follow-up evaluation of 121 former Mark Twain students who had returned to regular MCPS programs during 1978-80. This evaluation was conducted for two purposes: (1) to provide data on the success of these former Mark Twain students, and (2) to develop a set of evaluation instruments and/or procedures which could be used in subsequent follow-up efforts. Data were collected via telephone interviews with parents, surveys of administrators, behavior checklists completed by teachers, report cards, and student records. Analysis of the data indicated that many of the former Mark Twain students are performing satisfactorily in their current school with only minimal support in the form of special education services, and some are doing very well. Additionally, current returnees are performing somewhat better in the regular school environment than were earlier cohorts of returnees. A four-page executive summary is included. (PN)