Online student-response systems provide instructors with an easy-to-use tool to instantly evaluate student comprehension. For comprehensive content review, turning this evaluation into a competitive game where students can compete against each other was found to be helpful and enjoyable for participating students. One specific online resource, Kahoot!, provides the opportunity for crowd-sourced content quizzes to be generated, potentially enabling the creation of an open-source repository of review questions for the comprehensive ACS Analytical Chemistry exam.