The differences between open-book, cheat sheet, and closed-book exams were examined in two different types of psychology courses. A total of 297 students enrolled in eight sections of Introductory Psychology and 99 students This study developed from an ongoing debate in our department, one which is probably happening in many academic departments. The question is which type of exam is best. All teachers want their students to learn and retain the material they cover and at the same time enjoy the process of learning. One way to check how well students have learned is by giving exams. There are many teachers who consider the traditional closed-book and notes time-limited exam the best measure of student learning, while others argue for alternatives, such as cheat sheet or open-book tests. While a closed-book exam is probably the most common type of exam in psychology courses, alternative exam types, such as cheat sheets (or crib notes) where the students can prepare notes to use on the exam ahead of time, and open-book exams where the student can use all their material during the test, are increasingly accepted. Students themselves prefer alternative forms of testing, for example, Williams and Wong (2009) found that students prefer open-book exams compared to closed-book tests. Students believed that being able to use notes, cheat sheets and texts during an exam would improve grades and decrease their anxiety. Are these expectations justified? The purpose of this project was to examine the effectiveness of various exam types: open-book, closed-book, and cheat sheet. There is a relatively long history of trial-and-error efforts to improve testing procedures (Kalish, 1958;J. M. Stalnaker & R. C. Stalnaker, 1934). Surprisingly, there is little consensus among investigators as to which testing style may be the