The Commonwealth Computer-Assisted Instruction (CAI) Consortium continued to develop its algebra and general mathematics courses for ninth graders during the quarter ending August 31, 1969. The program's essential innovative features remained computer-controlled tutorial instruction supplemented by conventional individualized learning experiences. Plans were made to store student performance data and to use these to direct both on-line and off-line instruction. A field test of the CAI program was run with 16 students; for six weeks the pupils spent 20 minutes a day with the on-line program and 100 minutes daily with appropriate off-line materials. A manual was prepared for CAI teachers, outlining course content, computerized instructional sequences, program routines, and terminal operating procedures. A three-week workshop was held to familiarize teachers with the individualized aspects of CAI, to introduce them to computer programing using Coursewriter II language, to acquaint them with the content of the CAI math programs, and to provide them with experience in utilizing off-line materials. Finally, an IBM 1500 system with eight 1510 instructional stations was installed in Lincoln High School in Philadelphia and remodeling continued at Schenley High School in Pittsburgh. (PB)