What can be an indicator that an instructor needs to revise their teaching approach?

An increase in course withdrawals is a clear indicator that the current teaching approach may not be resonating with students or effectively meeting their needs. When students feel that they are not grasping the material, lack support, or find the content overwhelming, they may choose to withdraw from the course rather than continue facing difficulties. This withdrawal can suggest that the instructor's methods can be improved to facilitate better understanding, engagement, and retention in the class.

The other options hint at positive learning dynamics; for instance, high student engagement and frequent questions can signal that students are interested and interacting with the material. Similarly, more students joining study groups indicates that they may be seeking collaborative support, which can suggest that the content is engaging enough to encourage peer learning rather than a need for a revision in teaching strategy.