We’ve been pushing the pace in Physics. We’re working on collisions now, at least 6 weeks earlier than last year’s Physics C students. Why? We’ve got a lot to do, and this is just the first of 5 topics for the year. As in many AP classes, it’s a push and pull between depth and breadth. Sometimes we push out too far, which can sometimes create frustration. That happened today. At those times, it’s good to ease back and consolidate and work on solidifying things we’re already familiar with. At other times it’s important to push. Soon we’ll need to push into our next big topic, but just for a moment, we’ll pause. This is a tricky business we’re in.