A study was conducted to validate the Instructional Support System-Occupational Education (ISSOE) automotive mechanics curriculum. The following four steps were undertaken: (1) review of the ISSOE materials in terms of their "validity" as task statements; (2) a comparison of the ISSOE tasks to the tasks included in the V-TECS Automotive Mechanics catalog; (3) a comparison of the ISSOE tasks and the tasks contained in the Military Occupational Survey for Wheel Vehicle Mechanics; and (4) a similar comparison with the tasks included in the Soldier's Manual for Wheel Vehicle Mechanic. An initial review of the ISSOE materials found that 69% of the ISSOE tasks met task analysis criteria. The percentage of agreement of the three comparisons ranged from 66% to 75%, indicating substantial agreement in some of the major areas included in ISSOE and the three other lists. According to the study, ISSOE suffers only from lack of functional organization and some errors in level of specificity, duplication, improper statement of task, and perhaps some shortcomings in coverage. Two recommendations were made: (1) some of the ISSOE materials in other content areas should be subjected to analyses like this one; and (2) field surveys for some of the ISSOE materials similar in nature to the U.S. Army Survey should be undertaken to verify the findings of the earlier content validation. (CT)