If you did one. I'm just finishing up mine and I'm glad to be going back home. I pretty much worked on building a laser for a research group. While I was there I learned how to machine parts, a lot about optics and electromagnetism and science in a laboratory. It was a pretty good content PD but it will be difficult to bring back laser science to the 8th grade classroom. I did get a grant for classroom materials that I'm using to buy optics lab kits which will match great for the NGSS and I made a Ruben's tube as a machine shop project that I can use to teach more about compression waves. It's also further inspired me to get my MS in physics. When I get back we have a PD meeting about behavior interventions that I signed up for and I'm hoping that will be useful. How was your summer PD. Did you learn anything from it? Do you think it's useful for the classroom?