Instructors can intentionally structure their courses to incorporate online quizzes designed to promote two proven learning strategies: distributed learning and practice testing. This workshop will introduce you to a quizzing system containing more than 2,000 questions that are linked with specific learning objectives appropriate for multiple introductory geoscience courses (e.g., Physical Geology, Oceanography, Earth Science). Quizzes are administered through CLASS (Confidence-based Learning Accuracy Support System; www.classforlearning.com), a web-based system developed through NSF-supported research and road-tested in a range of institution-types. Course quizzes have been used to help students demonstrate their mastery of content and guide them to calibrate their learning against topic-specific learning objectives. CLASS also provides instructors with novel metrics they can then use to develop interventions to improve student outcomes. Please join us as we introduce you to the CLASS resources, provide you with access to question banks, and help you plan to use student-friendly quizzes to enhance learning in your courses.