Design-based learning for biology: Genetic engineering experience improves understanding of gene expression

Area of Science:

• Biology Education
• Molecular Biology
• Biotechnology

Background:

• Gene expression is a complex topic for high school students.
• Traditional teaching methods struggle with microscopic biochemical processes.
• A need exists for engaging, inquiry-based learning modules.

Purpose of the Study:

• To describe the Designer Bacteria unit, a design-based learning (DBL) approach.
• To assess the effectiveness of DBL in teaching gene expression.
• To evaluate student progress and performance in a DBL context.

Main Methods:

• Implementation of an 8-week Designer Bacteria unit for high school students.
• Students genetically engineer bacteria to address personal needs.
• Integration of investigations, discussions, and design modifications.
• Pre-unit and post-unit assessments to measure learning gains.

Main Results:

• Preliminary results indicate successful student learning of core gene expression concepts.
• Teacher experiences suggest the DBL unit is effective.
• Student progress on assessments demonstrates comprehension of molecular processes.

Conclusions:

• The Designer Bacteria unit effectively teaches gene expression through design-based learning.
• DBL is a viable pedagogical strategy for complex biological topics.
• Hands-on genetic engineering enhances student understanding of gene expression and environmental variables.