**AP Physics: CER**

Students have been struggling to explain their reasoning effectively, so we took a day to do some TIPERs problems on projectiles and energy using the CER framework. Most groups started with their claim, so I think next time, I will give some time for students to draw and interpret diagrams before I ask them for an answer. Its tempting to see what would happen with a goal-less TIPERs problem.

**Physics: Mistakes Game**

We played the mistakes game with yesterday’s pie chart problems. This is the first time I’ve done it this trimester, and I was surprised at how many students were very nervous about the prospect of presenting a board with unintentional mistakes, even after some discussion about whether anyone would know whether or a not a mistake was intentional. I need to keep working on building a sense of community and safety in this course.

**Chemistry Essentials: Particle Diagrams**

I showed students some examples of thermal expansion and had students whiteboard particle diagrams to explain what was happening. A few students made some great connections to the labs we’ve done.