Day 125: Board Meetings & Molar Mass

AP Physics: Lever Board Meeting

We had the board meeting to discuss the results of the lever lab. A few groups were quick to notice the slope slope on the force graph was the ratio of the distances to the pivot, while the slope on the distance graph was the ratio of the masses they used, which lead nicely into a definition of torque.

Physics: Pendulum Board Meeting

In my first hour, the board meeting was pretty rough with a lot of very long silences. I forgot this was the first board meeting of the trimester and about half of my students had the other physics teacher last tri, so I should have taken more time to set up the board meeting. My other hour is a little more talkative to begin with, but I also spent more time prepping for them discussion and things went much better.

Chemistry Essentials: Molar Mass

Students applied molar mass to some real-world problems, such as finding how many moles of chalk it took to write their name. Students are approaching the calculations for number of moles very algorithmically without much sense of why they divide the numbers they do. I need to think about how to make the why more apparent; I’ve discussed some analogies, such as bank tellers counting pennies by weight, but I wonder if it would be helpful to actually carry an analogy out in the lab.