**AP Physics 1: Torque Board Meeting**

We had our board meeting to get to the definition of torque. As expected, in the class where I had students plot the ratio of the forces on one axis and the ratio of the radii on the other, results were rough and I had to step in. In my other section, results came out beautifully and students were quick to figure out why their graphs had intercepts. I also introduced students to Brian Frank’s area models for torque, which students seemed to grasp.

**Physics: Slinkys**

We used slinkys to start figuring out some ideas about longitudinal waves. Students were pretty successful at noticing the things I wanted them to notice. As with transverse waves, we tied some ribbons on the spring to help track the particle motion.

**Chemistry Essentials: Molar Mass Lab**

I got out samples of several different materials, and had students weigh a sample and figure out how many moles they had. Not the most dramatic lab, but it was some good practice.

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