The purpose of this project was the establishment of materials suitable for slow learners in a life science program. The research focused on the development and testing of an eight-week study in life science and evolved through three phases: preparation, writing, and assembly of a student text and a teacher's handbook; preliminary testing during a pilot study; and comprehensive testing with five classes of homogeneously grouped slow learners. One class of homogeneously grouped slow learners was the population for the pilot study. A comprehensive testing program was used to determine student achievement with the use of pretests and posttests. Pretest-posttest data were compared and a significant difference was found to exist. (Author/CP)