The processes of mitosis and meiosis are oft-cited and long-standing examples of concepts that are difficult for students to learn and understand. While there are many examples in the literature of “how-to-do-it,” innovative instructional approaches for teaching mitosis and meiosis, publications that include measurement of learning gains are fewer. Moreover, when measurement of learning gains are reported, the outcomes of innovative approaches are most often compared to outcomes from traditional lecture-format instruction. In contrast, this research compares two active-learning approaches to teaching meiosis through modeling in an introductory undergraduate biology course for health sciences majors. Items from the published, validated Meiosis Concept Inventory were used for pre- and post-instruction assessment. In addition, we collected data regarding student perceptions of the learning experience in each modeling scenario through two Likert-scale items and two free-response items. Overall, students demonstrated significant learning gains from pre- to post-assessment. We found no significant differences in performance on the posttest between the two modeling approaches, indicating that the selection of the modeling activity used to support student learning can be made on the basis of other criteria, such as instructor preference, physical classroom layout, or available supplies.

Instructors in two- and four-year undergraduate institutions face a variety of challenges in designing and delivering high-quality courses for their students and in creating accurate assessments of student learning. Traditional course planning (a linear, start-to-finish process based on the knowledge and perspective of the instructor) can lead to lack of clarity of learning objectives for students, uncertainty about course priorities for both instructor and students, and poor alignment between course material and assessments. To address these issues, Understanding by Design (UbD), a course-planning protocol widely used in K–12 education, was implemented to redesign a one-semester, nonmajors “Sensation & Perception” course at a four-year liberal arts college. This implementation improved the instructor's understanding of desired student learning outcomes, allowed core concepts and science competencies to be prioritized as recommended by the “Vision and Change” reform initiative, and led to decreased lecture time in favor of greater lab and student-driven discussion time. In addition, this process allowed components of evidence-based reasoning and scientific process to be incorporated authentically into assessments. Despite the increasing rigor of assessments, there was a statistically significant increase in students earning an A or B on the final exam after UbD implementation.