Day 112: Rotation, Free-Fall, & Skew Dice

Today was the first day of a new trimester.

AP Physics: Rotation

Students used Pivot Interactives to make angular position vs. time graphs for several points on a disk with a constant angular velocity and a point on an accelerating disk. Back in September, my students who took calculus last year were able to make a lot of connections when we did graphs for linear motion. One of the great things about returning to circular motion now is my students currently taking calculus now have enough background knowledge that they were able to make some very similar connections today.

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Physics: Free-Fall

To kick off projectile motion, students worked through a worksheet I got from Michael Lerner where they were asked to describe the motion of a falling orange using a variety of tools from earlier in the year. This seemed to help some student synthesize and connect a lot of ideas from earlier in the year.

Chemistry Essentials: Skew Dice

A lot of my students haven’t had chemistry since first trimester, so I wanted to reestablish some class norms. I used Frank Noschese’s subversive grouping to get students into group, then had them whiteboard a CER to answer whether skew dice are fair. Time got a little tight, so a lot of groups collected less data than I normally would push for, but in the follow-up discussion, that gave us the opportunity to talk about the value of getting as much data as possible.

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