Experimental Programed Instruction of the anatomy of the maxillary division of the trigeminal nerve is being conducted by the Harvard Computer-Aided Instruction Laboratory in cooperation with Tufts University Dental School. Two nearly identical programs are presented, one (PF) using representational diagrams and the other (PD) a schematic diagram and identification key. First year dental students were randomly selected and divided into four groups, each group taking the four sections of the two part course in a different sequence. Attitude testing toward programed instruction and subject achievement testing was performed both before and after the course. The entire course requires an average two and one-half hours of student time. Of the six pretest students who took the first three-quarters of the course, it was found that Program PD yielded the most gain on Sections One, Two, and the total, but Program PF yielded more on Section Three. There was less overall gain on Section Three than on the other two sections. More data will be accumulated in the academic year 1969-70. Included in the document are examples of the schematic and representational diagrams, pre- and post-attitude questionnaires, achievement tests, sample lessons, a table of results, a program abstract and a list indicating distribution of the document. (SH)