In AP Physics 2, we didn’t have time after a practice quiz for a series of peer instruction conceptual questions. However, I did share one of the more challenging next-time questions:
Students worked independently for a few minutes to answer the question. I then had them discuss in table groups their answers and work on their justifications. Finally, we discussed as a whole class. I particularly like this questions, because it shows that it is easier to prove that if current was to flow through the middle LED that an inconsistency results rather than proving that current cannot flow through the middle LED.