My nephew and daughter experienced constructive interference of water waves first hand over vacation. Quite fun.

Wish me luck today, in a few minutes I will be presenting about Flipping Education to current University of Michigan education students. :)

Also, I recently finished editing a video and on my final quality check I noticed mr.p referred to a force as the Force Applied while Billy, Bobby, and Bo called it the Force of Tension. (In the picture: FBD has Tension Force, Net Force equation has Force Applied.) In this particular case, you could refer to it as either, however, we should be consistent. So let me ask you, how could Billy, Bobby and Bo all sit through the lesson and not ask a question about it? I mean really, teachers make mistakes and it is the students' responsibility to ask questions when they don’t understand something. I guarantee you they noticed this mild transgression and chose not to ask about it. However, if just one of them had asked, I wouldn’t have to re-teach the whole lecture. So please, let this be a lesson to you, ask questions when you have them, please.