The two envelopes method for active learning.

Purpose: Active learning improves knowledge acquisition and provides medical students with learning habits that become an integral part of their behavior. As an integral element of our institution's transition from a lecture hall teaching culture to active learning, the current project, conducted with fourth year students, aimed to examine the effects of the two envelopes method of teaching on students' knowledge.

Method: The class of 120 students was divided into 12 groups of 10 students each.