**AP Physics: Mistakes Game**

We spent about 15 minutes using Plickers to discuss some multiple choice from the practice test students took last week, then started working on the 2016 free response. Students started prepping whiteboards that we’ll use for the mistakes game tomorrow. Most groups got to the point where they felt they had a good solution on their whiteboard, so will need a few minutes tomorrow to add a mistake.

**Physics: Standing Waves**

We got out the singing rod to reason out what must be the pattern for standing waves on a resonator free to vibrate at both ends, then students started working on some problems. A lot of students struggled to relate wavelength to the length of the resonator, in part because many of them were looking for a specific equation rather than using the diagrams the worksheet asked for as a reasoning tool. I need to think about how I can help students see the value of their diagrams tomorrow.

**Chemistry Essentials: Lab Wrap-Up**

The copper from yesterday’s lab needed some time to dry, so today students got the mass and worked on their calculations. A lot of groups had balled up their aluminum foil yesterday, which lead to some big chunks of unreacted foil, even for groups where it should have been the limiting reactant. This ended up being a great opportunity for students to use a particle model for chemical reactions to think through why that happened.

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