Having first developed a method, based on Bloom's taxonomy (1956), for assessing the thinking levels required by study questions in computer-mediated courses (Crone-Todd, Pear & Read, 2000), we developed a method for assessing the levels at which students answer the questions. Reliability measures between two independent assessment groups were high (i.e., > 80%). The assessment procedure can serve diagnostic and research purposes in determining how to enable students to increase their thinking levels in post-secondary courses.