Comparing the efficacy of permanent classroom teachers to temporary health educators for pregnancy and HIV prevention instruction.

Ninth grade health education classrooms were randomly assigned to conditions in which a 14-lesson unit on HIV and pregnancy prevention was provided either by the permanent classroom teacher or by a temporary health educator. Student data were collected prior to the lessons and approximately 3 weeks after the completion of the unit. Results indicate that students who learned the unit from the classroom teacher reported that that the instructor was more likeable and credible and that the classrooms were more motivational. Sexually active adolescents with regular classroom teachers reported greater increases in frequency of class discussion.