An instrument to measure student reports of perceived teacher invitations and of teacher behaviors traditionally considered effective was developed and validated. Invitational (I-type) factors and effective (E-type) factors were correlated with academic achievement. Scale items were suggested by the literature, and then rated and categorized by expert judges. The revised instrument identified five factors: Caring, Respect, Course Organization, Interpersonal Contact, and Learning Environment. The first two factors identified I-Type teacher behaviors, the latter three identified E-Type behaviors. The reliable and valid instrument, containing 26 I-Type and 24 E-Type items was administered to technical college students. Significant positive relationships were found between: (1) I-Type and E-Type teacher behaviors as perceived and reported by students; (2) teacher behaviors and student reports of course grades; (3) teacher behaviors and student reports of how hard they worked in the course; (4) teacher behaviors and student reports of how much they learned in the course; and (5) teacher behaviors and type of curriculum taught. Students perceived general education instructors as higher I-Type and E-Type teachers than technical education instructors. Test items are included. (Author/RD)