Today, I had hoped to spend most of class engaging in peer instruction of thin-film conceptual questions. Instead, we spent most of class discussing the electromagnetism and electromagnetic induction exam which I passed back today. Students had a lot of questions beyond the broad feedback that I wanted to share with the class. Always hard to strike a balance between spending time in class going over an exam about which most students don’t have any questions and giving students an opportunity in class to ask questions. Today, given the overall performance on the exam, I leaned towards to later.