Plans for evaluation should be laid prior to implementation of a program. A hierarchy of types of program evaluation helps select the exact type of evaluation intended. This hierarchy starts with the easiest (and least useful) type of evaluation and six progressively more difficult levels of evaluation are added in cumulative fashion. The seventh and final type is a master plan for evaluation, which should be accomplished by starting with the top steps and their interrelationships and working down. The evaluation types, with applicable questions for extension leader orientation, are: (1) inputs made--How much time and money are expended in leader orientation, and is this the right amount? (2) activities performed--What kinds of orientation activities are new leaders engaged in, and are there the right number of activities? (3) recipients involved--With how many leaders do we allocate certain amounts of orientation time and activity? (4) reactions--How do volunteer leaders react to their orientation? (5) "KAS" change (change in knowledge, attitudes, and skills)--Which development are a consequence of orientation? (6) "practice" change--Do the attitudes, skills, and knowledge gained through orientation help the volunteer in working with 4-H participants? (7) results achieved--Do the volunteer roles help achieve ultimate aims with 4-H youth? Evaluation at the lower levels is meaningless without answers to higher evaluative questions. (KM)