Attributional retraining is a therapeutic method for reinstating psychological control that may be useful for improving students' achievement in the college classroom. After attributional retraining or no training, internal- and external-locus students observed a videotaped lecture presented by either a low- or a high-expressive instructor in a simulated college classroom. One week later they wrote a test on the lecture and on a homework assignment. Attributional retraining improved external, but not internal, students' performance on both the lecture and homework tests. Expressive instruction also enhanced lecture- and homework-related achievement in external students but not in internal students. These results suggest that cognitive factors influencing students' perceived control (e.g., internal/external locus) must be taken into consideration when remedial interventions for academic achievement are developed. The results are interpreted within a social cognition framework.