This case study presents information on the actual cost of teachers' producing their own learning and instructional materials. The figures reflect the various elements that go into materials development and would need to be considered for similar undertakings. Descriptions of and average costs are given for 10 material development activities: (1) research and pre-writing; (2) writing; (3) course design; (4) secretarial and administrative tasks; (5) layout and typesetting; (6) pilot testing; (7) proofing; (8) print and production; (9) miscellaneous; and (10) training. In addition, unforeseen costs that were absorbed or not charged are listed. The sums listed reflect the cost of developing approximately 60-80 hours of student learning material. Recommendations are given on points to be considered when the decision to develop materials is made. (JD)