The importance of mainstreaming (helping handicapped children achieve maximum participation in regular school programs) is emphasized, and underlying concepts are explained. Methods for implementing mainstreaming in protected settings (such as hospitals) and in regular classrooms (through the use of helping teachers, resource rooms, a modified resource program, or open classrooms) are described. Noted are the following common elements of successful mainstreaming programs: preparation, pacing (selective integration), specificity (redefining the special educator's role), and flexible placement. Also included is an annotated bibliography of 14 references on mainstreaming in action. (LH)