The projects on this page involve study design: category 2
...compares outcomes or gains from different learning conditions across semesters. For example, the same instructor may teach the same course two different ways in consecutive semesters. This design allows comparisons of teaching strategies (e.g., “treatment” vs. “control” or “condition A” vs. “condition B”) when enrollment in a single course offering is relatively small. Students differ across semesters, thus each student does NOT experience every learning condition. One must assess and account for any pre-existing differences among groups of students.