The Leader in Accounting Exam Prep for Over 40 Years. Gleim Exam Prep is one of a kind because our easy-to-use 3-Step Approach enables candidates to diagnose weak areas, study from expertly-authored review materials, and apply their knowledge with thousands of questions, essays, and simulations. All of our content is written by professional educators, and our test banks are the largest on the market. Our innovative materials also include video lectures, audio reviews, and practice exams backed by our Access Until You Pass® Guarantee. History Established in 1974. Gleim Exam Prep was established in 1974 by Irvin N. Gleim, Ph.D., CIA, CMA/CFM, CPA. Since then, Gleim has helped millions of people move forward in their careers by passing certification exams such as the CPA Exam, CMA Exam, CIA Exam, and Enrolled Agent Exam. Our strong reputation for excellence is founded in our authentic exam emulation, exceptional coverage, and customer-centric support.