The general emphasis of Project LONGSTEP was on the identification of changes in student achievement that occur as a result of exposure to intensive educational innovation. This booklet provides a brief overview of the project. A total of five project reports plus two separate appendices of supporting data were produced by Project LONGSTEP. This summarizes very briefly these five reports. "Data Collection Instruments and Guidelines" developed for Project LONGSTEP referenced in Vol. I, Chapter II, Section C, will be accessioned TM 005 987 in RIEMAY77. (RC)