Building domain knowledge is essential to a student's success in any course. Chemistry, similar to other STEM disciplines, has a strong cumulative element (i.e., topic areas continuously build upon prior coursework). We employed the testing effect, in the form of post-exam retrieval quizzes, as a way to improve students' understanding of chemistry…

Students of a required biology course for non-science majors were given an opportunity to take online multiple choice quizzes during the weekend interval between classes. Incentives were that they would be given extra credit for their participation. Questions from the quizzes were then placed on the next exam. After the exam was given, the number…