What can help an educator maintain students' interest over time?

Varying teaching stimuli every 20 minutes is effective in maintaining students' interest because it caters to different learning styles and keeps the content fresh and engaging. People often have limited attention spans, and by introducing new elements in teaching—such as switching between lectures, discussions, multimedia, or hands-on activities—educators can better capture and hold students' attention. This approach prevents monotony and encourages active participation, which can enhance retention and understanding of the material.

Additionally, breaking up information into manageable segments allows students to absorb knowledge more effectively. It creates a dynamic learning environment that stimulates curiosity and promotes ongoing engagement with the subject matter, ultimately leading to a more productive educational experience.