We went slow and steady today. Magnetic flux is not an easy concept, and we want to make sure we understand it and the long, causal reasoning that goes into electromagnetic induction.
We started by debating a lot about how the flux changes. One student in particular mentioned an interesting point about what happens when you push the magnet in through the loop. Doesn't the magnetic field change direction? It took a while to clarify the question, and in that clarification, we got to talk about how the magnetic flux doesn't really have a direction. It's just positive or negative.
We spent a lot of time talking about the reasoning we'd use to figure out the direction. We got to hear many ways to explain our thinking. At the end of class, we even got to see magnetic induction using the function generator, and the current in the second loop only happened when the current in the first loop changed. We can explain transformers and wireless charging now.