Students (comparable in intelligence and ability) in slow-learning classes using either "Biological Sciences Curriculum Study (BSCS) Special Materials" or some other slow-learner biology materials, were compared on the basis of scores on the "Nelson Biology Test", the "Biological Sciences; Patterns and Processes Final Examination", and two short occupational science-related interest questionnaires. There were no significant differences between the groups on any measure used. (Author/AL)