Chairperson, Graduate Committee: C. John GravesFeldbruegge, Adam Frank2024-10-312023https://scholarworks.montana.edu/handle/1/18145The purpose of this action research was to analyze the effect of inquiry-based learning in the high school physics classroom. Specifically, this research analyzed the impact of inquiry-based learning on student ability to scientific reasoning and concept mastery within the units of motion, force, energy, and momentum. The non-treatment group received instruction with a partially flipped classroom approach, with assigned pre-lecture videos and lectures focused on direct application of the content; whereas the treatment group learned through inquiry and following the experiments, were guided with questioning and further labs to fill in conceptual gaps in the content. Pre- and post-test results were analyzed to measure normalized gains in both scientific reasoning and conceptual understanding. Surveys and interviews were analyzed to measure student interest and attitude. The results of this study revealed that the non-treatment group achieved higher normalized gains in conceptual understanding in the areas of force, motion, energy, and momentum; whereas the treatment group achieved higher normalized gains in their ability to reason scientifically. While the theory-practice gap is a real inhibitor to inquiry-based learning in the physics classroom, students were able to connect course content with real-life scenarios, resulting in an overall positive experience for students.enPhysicsHigh school studentsInquiry-based learningReasoningConcept learningProfessional PaperCopyright 2023 by Adam Frank Feldbruegge