AP Physics: Levers
I showed students 2nd and 3rd class levers, then asked them to determine whether the rules for a balanced lever we found last week still work. There was a lot of variety in the type of graphs students opted to make to answer this question, but by the end there was a good consensus that these other types of levers still had balanced torques.
Students started collecting data to find what affects the period of a spring. I made sure to emphasize the parallels to last week’s pendulum lab, which seemed to help a lot of groups with the experimental design. There were also some great conversations as students tried to predict how certain variables would affect the period.
Chemistry Essentials: Balancing
Friday’s quiz on balancing and molar mass was one that students either nailed or tanked, with very few in between, so today students got some more practice. A lot of students seem to be approaching groupwork with the idea that if someone at the table has the right answer, they are covered. I pushed back against that today by giving each table a stamp sheet they had to fill by having different members of the group explain to me how they got their answer. Students talked a lot more within their groups than usual, which is exactly what I was going for.