Combining peer discussion with instructor explanation increases student learning from in-class concept questions.

Area of Science:

• Biology Education
• Genetics Pedagogy

Background:

• Traditional instructor-centered classrooms can be enhanced by incorporating technology like clickers.
• Clicker-based questions facilitate a shift towards more learner-centered constructivist teaching environments.

Purpose of the Study:

• To compare the effectiveness of three distinct pedagogical approaches using clickers in genetics courses.
• To investigate how different student ability groups respond to these approaches.

Main Methods:

• Pairs of similar concept questions were administered to students in majors' and nonmajors' genetics courses.
• Students engaged in one of three conditions: peer discussion only, instructor explanation only, or peer discussion followed by instructor explanation.
• Student understanding was monitored individually before and after the intervention.

Main Results:

• The combination of peer discussion and instructor explanation led to substantial improvements in average student performance.
• All student ability groups (weak, medium, strong) showed the greatest benefit from the combined approach.
• While strong performers benefited less from instructor-only explanations, weak nonmajor performers showed only marginal gains with the combined approach compared to instructor explanation alone.

Conclusions:

• Peer discussion and instructor explanation are synergistic, significantly enhancing student learning in genetics.
• The optimal pedagogical approach using clickers varies by student ability and course level.
• Emphasizing peer interaction is crucial for engaging all students, including high achievers.