The general emphasis of Project LONGSTEP (Longitudinal Study of Educational Practices) was on the identification of changes in student achievement that occur as a result of intensive educational innovation. The data collection instruments used in Project LONGSTEP provided information on student cognitive performance, student characteristics, student attitudes, teacher characteristics and educational treatments. Student cognitive achievement was measured by standard, commercially developed instruments. Student characteristics and attitudes and teacher characteristics were assessed by questionnaires developed specifically for the study. Educational treatment characteristics were documented by specially designed instruments developed for staff use during site visits. Copies of the final questionnaires, treatment documentation, and classroom documentation instruments are included herein. Also included is a set of guidelines developed to train field observers in the use of the classroom documentation form. (Author/RC)