Occasional short quizzes were given covering 1/3rd of the material covered by the teacher. The quizzes were "no stakes" (doesn't affect student grades) and the teacher was required to leave the room while the quizzes were in session to be unaware of the material tested.

3 types of quizzes were given:

• quiz at start: This quiz was given at the beginning of class and tested on assigned readings not yet discussed in class.
• quiz at end: This quiz was given at the end of class after the teacher covers class material.
• review quiz: This quiz was given 24 hours before each unit exam.

Quizzes were administered through clicker questions and correct answers were revealed once all students answered the question. Besides implementing the quizzes, the class structure, material, and teaching methods were kept the same.