This is Volume 2 of a recurring series on interpreting research, meant to help educators better interpret the research out there on practices and interventions, so that we can all be more informed. Check out Volume 1 if you didn’t read it, which is on the anatomy of a research study, what the different parts of each article are. Now that you know what the different pieces of the articles you are reading are, and what information is contained in each, I feel it is important to talk about the different types of articles you might read, and the ways in which the experiments are designed in these articles.