A review of data that have been used to evaluate college teaching suggests that the definition of teaching used for those evaluations has been very incomplete. An expanded definition includes the following seven components of college teaching: (1) subject matter mastery; (2) curriculum development; (3) course design; (4) delivery of instruction; (5) assessment of instruction; (6) availability of teacher to students; and (7) administrative requirements. Several possible sources of data exist to evaluate college teaching. Data from students have generally been collected systematically, but such data usually focus on instruction. Sources include self-ratings by teachers, personnel files, student evaluations, peers (same subject matter), colleagues (other subject matter), ratings by department chair or dean, administrator ratings, evaluation by instructional consultants, and other sources unique to the given aspect of teaching. It is evident that evaluating college teaching adequately requires more time than has generally been given in the past. An 11-item list of references is included. (SLD)