Day 115: Board Meeting & Connecting Representations to Observations

AP Physics 1: Ohm’s Law Board Meeting

We had a board meeting for yesterday’s results. One of the things I was really happy about is not all groups used the same approach to dealing with three variables. Some did one experiment graphing current and voltage, followed by a second experiment graphing current and resistance. Others just graphed current and voltage, but did the same experiment with two different resistances.

ap ohm.jpg

Physics: Spring Period Board Meeting

We whiteboarded the results from this week’s lab on spring period. When writing the equation, a lot of students had trouble with when to use a unit and when to use a variable, but that’s been tough throughout this year. I think a lot of students are struggling to distinguish what those two things communicate, so I need to give some thought to how to teach that difference.

phys spring.jpg

Chemistry Essentials: Connecting Representations and Observations

One of the things I think has been missing in the second half of this course is students draw very few connections between what they actually see in the lab and the representations they use for chemical reactions, so my co-teacher and I decided to work on that this year. Today, we did a lab where students did several simple chemical reactions, then identified observations that support specific elements of the reaction equation. For example, when students reacted copper (II) chloride with aluminum, they were able to recognize the reddish powder that replaced the aluminum was the copper predicted by the reaction equation.

chem lab (1).jpg

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