A general science course designed to meet one of the science requirements for prospective elementary school teachers at the University of Alabama emphasizes mastery learning of factual content, and is intended to provide an overview of the several areas of science that typically constitute elementary school science. This report describes this course, one of three developed at the university, which use the "Keller Approach" to provide individualized instruction (II). At the beginning of the semester, each student receives a course outline with the topics to be covered; textbook assignments; and descriptions of the course and procedures to be used for progress checks, attendance, the final examination, and final grades. The course consists of l8 units, and all units must be completed in sequence. Prior to starting work on a unit, each student receives a study guide for that unit which includes an introduction to the unit, a list of the objectives to be mastered, and a suggested procedure to ensure mastery. A quiz is given on completion of each unit. The staffing consists of one professor and five student proctors. Attendance is not required at each class period; however, the professor is present to assist students who need help and to administer unit progress checks. Final grades are based on a single comprehensive examination and two points are given for completing progress checks on time. Leaders in the class may earn bonus points by serving as student monitors. Appended materials for students include an outline of the course, the course description and procedures, the study guide for Unit 12 (Engines), and a unit progress schedule form. (Author/DJR)