Exam reviews are a common offering within and across courses, often supported by departments, learning centers, and success centers. However, the majority of typical exam review formats follow the lecture or direct-teach format, with instructor-centered re-teaching or problem-solving as the mode of review. In lieu of this traditional and more passive offering, Balch (1998) found that students of all academic ability benefitted from active practice exam reviews and outperformed those who participated in typical exam reviews. This article shares an example of a new type of the active practice exam review--collaborative mock exam. The authors saw positive student feedback on both the implementation and the structure of the collaborative exam review, with about 60% of enrolled students participating in all three collaborative mock exam reviews. Encouraged by these results, the author's future plans include quantitative and qualitative analysis to understand impacts of the collaborative mock exam reviews on students' grade outcomes, as well as students' motivations for and perceptions of participating in the collaborative mock exam reviews.