Effectiveness of flipped classrooms on student outcomes

Marta Pellegrini, University of Cagliari, Italy

Flipped classroom refers to an instructional approach where students first learn new material through videos outside of class, and then use class time for reviewing the content, hands-on activities, and deeper learning.

A meta-analysis conducted by Li and colleagues examined the effects of flipped classrooms on K–12 student outcomes. The authors included randomized and quasi-experimental studies with more than ten students in which flipped classrooms were compared to regular teacher practice. After excluding the studies that did not meet the criteria, 129 studies were included in the review.

The average effect sizes after excluding outliers were +0.53 for student performance, +0.56 for cognitive outcomes, and +0.46 for affective outcomes. Due to the high variability in effects between studies, the authors examined which characteristics are factors (e.g., duration, teacher training) that moderate the effects of flipped classrooms. Region was found to be a significant moderator, with a larger effect in low- and middle-income countries compared to high-income countries. Considering methodological characteristics, the authors found that it is more effective when the same instructor teaches consistently than when instructors change during an intervention. In addition, outcomes that include a wide range of tests show smaller effect sizes than those that use more specific measures, such as a unit test.

Overall, the characteristics related to educational context and research methodology explained a substantial portion of the variability in the overall effects.