A field test of a computer-assisted instruction (CAI) program of inservice education in modern mathematics and mathematics teaching methods for elementary teachers was conducted at California, Pennsylvania in the summer of 1969. The course, called "elmath", consisted of 80% mathematical content and 20% teaching methods, with the methods units interspersed throughout so that each would be studied immediately following the presentation of related content. Results of various analyses of data gathered during the course from the 130 participants showed that the program was effective in providing inservice education for teachers of elementary school mathematics and other educators, that the program increased favorable attitudes toward mathematics, that the content of the course was probably learned faster in the CAI format than in a conventional classroom, that the course needed several revisions, and that both high and low achievers expressed favorable opinions toward CAI. Appended is a course description of "elmath" and a student opinion questionnaire. EM 011 037 through EM 011 043, EM 011 046, EM 011 047, and EM 011 049 through EM 011 058 are related documents. (SH)