ANALYZING COPUS DATA
To determine the prevalence of different codes in various classrooms, we added up how often each code was marked by both observers and then divided by the total number of codes shared by both observers. For example, if both observers marked “Instructor: Lecture” at the same 13 time intervals in a 50-min class period and agreed on marking 25 instructor codes total for the duration of the class, then 13/25, or 52% of the time, the lecture code occurred for the instructor.