Day 140: Whiteboarding & Pivot Limiting Reactants

April 30, 2019 / Marta R. Stoeckel / Leave a comment

AP Physics 1: Board Meeting

Students whiteboarded their results from yesterday to get to a definition of angular momentum, as well as the relationship between torque and angular momentum. They made nice connections to conservation of linear momentum as well as impulse.

Physics: Ray Diagram Mistakes

We did mistakes whiteboarding with yesterday’s ray diagram problems. Students were doing very well figuring out which rays were critical to the problem and catching each other’s mistakes.

Chemistry Essentials: Pivot Limiting Reactants

I am as part of Pivot Interactive’s Chemistry Fellows program.

Students used Pivot Interactives to do a lab involving limiting reactants. Since lab data makes it tough to use particle diagrams, I tried having students convert their balanced reaction equation into “for every” statements. A lot of them were pretty successful using those statements to make sense of the other calculations I asked for.

Day 139: Angular Momentum, Ray Diagrams, & Limiting Reactants

April 29, 2019 / Marta R. Stoeckel / Leave a comment

AP Physics 1: Angular Momentum

I am as part of Pivot Interactive’s Chemistry Fellows program.

Students used Pivot Interactives to explore collisions that involve angular momentum. I especially like the activity they have with a marble fired at a wood block since it provides an opportunity to review linear momentum, as well as discover a relationship between torque and angular momentum.

Physics: Ray Diagrams

Students sketched ray diagrams to explain their observations in Friday’s lab. Students were able to make good connections between their ray diagrams and their observations.

Chemistry Essentials: Limiting Reactants

Students whiteboarded some limiting reactant problems, emphasizing the particle diagrams that could be used to solve the problems.

Day 138: Multiple Choice, Pinholes, & More Limiting Reactants

April 26, 2019 / Marta R. Stoeckel / Leave a comment

AP Physics 1: Multiple Choice

After a short quiz, we used Plickers to review some multiple choice. There was a lot of good discussion about the problems and some good test-taking strategies also came out of the conversations.

Physics: Pinholes

Students made observations and dew ray diagrams for some pinhole viewers. They had some trouble getting images at first, but, once they got the hang of it, seemed to enjoy the lab. It was a nice, sunny morning, so we went out the back door of my classroom to look at things, but it was also chilly, so most students went back inside when they were drawing ray diagrams.

Chemistry Essentials: More Limiting Reactants

Students did some limiting reactant problems involving polyatomic ions. All of the problems were ones that could be solved by drawing a particle diagram, and students seem to be embracing those as a problem-solving tool.

Day 137: Lots of Whiteboarding

April 25, 2019 / Marta R. Stoeckel / Leave a comment

AP Physics 1: Unbalanced Torque Whiteboarding

We did some mistakes whiteboarding with some torque problems. Students made great connections to what they already know about unbalanced forces, which is making it possible to move quickly through the topic.

Physics: Ray Diagram Whiteboarding

Students whiteboarded some ray diagrams from yesterday’s shadow lab. They made the connections I wanted them to make and were making sense of how the ray diagrams fit with what they saw.

Chemistry Essentials: Limiting Reactant Whiteboarding

We did some whiteboarding of limiting reactant problems emphasizing the particle diagrams as a problem-solving tool. I haven’t pushed the diagrams as much this year as in the past, and it showed on a quiz I graded earlier today. Now is time to start rectifying that mistake!

Day 136: Board Meeting, Shadows, & Limiting Reactants

April 25, 2019 / Marta R. Stoeckel / Leave a comment

AP Physics 1: Unbalanced Torque Board Meeting

Students whiteboarded their results from yesterday. They quickly and easily made the connections I was after and the idea of rotational interia seemed to click well.

Physics: Shadows

I did a quick intro to ray diagrams. I like to clap some chalk dust over the beam from a laser pointer to show the light travels in a straight line. This year, I followed up with clapping chalk dust over a flashlight beam to see the cone of light and motivate drawing multiple rays, which worked very nicely. Students then played with shadows and drew ray diagrams to explain their observations.

Chemistry Essentials: Limiting Reactants

Students worked on some limiting reactant problems. Based on some questions students asked yesterday, we also revisited a reaction we’ve done with magnesium and hydrochloric acid. I set up one flask with indicator and hydrochloric acid to use as a reference. In the other two flasks, I also added magnesium and tasked students with making observations to determine what the limiting reactant was in flasks 2 and 3, which they answered using a CER.

Day 135: Pivot Angular Acceleration, FCI, & Limiting Reactants

April 23, 2019April 23, 2019 / Marta R. Stoeckel / Leave a comment

AP Physics 1: Pivot Angular Acceleration

I am as part of Pivot Interactive’s Chemistry Fellows program.

Students used Pivot Interactives to find a relationship between unbalanced torque and angular momentum for several different bicycle wheels. I had them start by setting up a formula they could use to calculate the angular acceleration from the change in angular position and the time. My 2nd hour had a much easier time with this; I think the difference is they worked yesterday’s problems in small groups and quickly connected this task to some of the problems they’d done. My 4th hour had a sub yesterday who was a former physics teacher that decided to go through the problems as a lecture, so I think those students didn’t have as firm a grasp on the calculations.

Physics: FCI

Students took the Force Concept Inventory as a post-test. We normally give it before moving into simple harmonic motion, so they were a little rusty on thinking with forces, but I’m satisfied with the results.

Chemistry Essentials: Limiting Reactants

Students used nuts, bolts, and washers to start connecting mass to what I’d planned for them to see about limiting reactants yesterday. While both my sections were able to get through today’s activity without trouble, I need to figure out how to adjust for some issues yesterday. My 5th hour is co-taught, so my co-teacher ran the class and the majority of students easily finished yesterday’s activity and had the ideas I wanted them to have at this point. In my 6th hour, the sub decided to go over the answers to the accompanying worksheet as a lecture without projecting the simulation, which my students really struggled to follow. Several students helped themselves to a computer and worked through the activity as intended, and I’m having trouble getting mad at them for defying the sub. I think the activity with the simulation is worth doing, but between demand for the school computers and trying to keep both sections in the same place, I’m not sure how to give my 6th hour time in-class.

Day 133: Goal-less Problem, Forces Revisited, &

April 18, 2019 / Marta R. Stoeckel / Leave a comment

AP Physics 1: Goal-less Problem

We started with some mistakes whiteboarding of yesterday’s problems, which went very quickly and smoothly thanks to the connections my students were making to linear motion. Afterward, I gave them a goal-less problem for accelerated circular motion, and those connections continued to serve students well

Physics: Forces Revisited

We’d originally planned on taking a few days to close out the mechanics part of the course after oscillating springs, but the other physics teacher and I both forgot. Now that we’ve done what we’re going to with mechanical waves, we decided now would be a good time. Students worked on some problems revisiting the links between force, motion and other concepts from this year. There was lots of good discussion as they worked.

Chemistry Essentials: Gallery Walk

We did a gallery walk of some stoichiometry problems. Students have been doing well with the problems and seem to understand WHY they are doing the math they are, which I’m really excited about. I’m thinking about switching to BCA tables in the future; I need to spend some time trying problems with them. We’ll be starting work on some curriculum revisions for the course next year, and that might be a good time to take a closer look.

Day 132: Angular Motion Representations, Whiteboarding, & Stoich Problems

April 17, 2019 / Marta R. Stoeckel / Leave a comment

AP Physics 1: Angular Motion Representations

We started by discussing yesterday’s activity to introduce angular velocity; there was some great debate about which dot on the disk was moving the fastest, which lead exactly where I wanted it to. Afterward, students worked on some problems translating between different representations of angular motion. Students fell very easily back into the kind of thinking we’d done with linear motion, which made the problems a breeze.

Physics: Whiteboarding

We finished going over the standing wave problems and took a quiz on the topic.

Chemistry Essentials: Stoichiometry Problems

Students worked some stoichiometry problems that included polyatomic ions. Most students are doing very well with the problems, which has me very optimistic about tomorrow’s quiz.

Day 131: Pivot Angular Motion, Whiteboarding, & Pivot Stoich

April 16, 2019 / Marta R. Stoeckel / 1 Comment

I am a part of the Pivot Interactive’s Chemistry Fellows program.

AP Physics 1: Pivot Interactives Angular Motion

As students finished their torque quiz, I had them use Pivot Interactives to look at the motion of a spinning disk and come up with two different answers to which dot on a spinning disk is moving the fastest. Tomorrow, we’ll use those two answers to get into angular velocity vs. tangential velocity.

Physics: Whiteboarding

We spent some time whiteboarding yesterday’s problems. Students resisted drawing the diagrams for standing waves, but, once they got the diagrams, they were able to solve the problems.

Chemistry Essentials: Pivot Interactives Stoichiometry

Students used Pivot Interactives to compare their prediction for how much hydrogen gas should be produced in a reaction to how much was actually produced. I ran into an issue where a few students were very insistent that a prediction is a guess, so their calculation could not be a prediction. I didn’t have a great response in the moment aside from in science, a prediction should have something to back it up, which can be a calculation.

Another hurdle I ran into today is I have one section where a lot of students really resist talking to their group members, and the computers made it easier for them to work in isolation. As a result, I realized partway through the hour I was frequently answering the same questions multiple times with a given group and I was helping individual students with portions of the activity their partners knew how to do. I need think about how I can help my students have more productive collaboration within their group.

Day 130: Whiteboarding, Problems, & Lab

April 15, 2019April 15, 2019 / Marta R. Stoeckel / Leave a comment

AP Physics 1: Whiteboarding

We did some whiteboarding of last week’s torque problems. Students aren’t confident, but they are getting the hang of extended free-body diagrams and successfully solving problems. With the clock ticking, that will have to be good enough for balanced torques.

Physics: Problems

Students did some problems with standing waves. It was tricky for a lot of them to connect the wavelength to the length of the resonator, so that will be something to work on during whiteboarding tomorrow.

Chemistry Essentials: Lab

Students did a lab with magnesium and hydrochloric acid. We stuck with purely qualitative observations today and will get into the actual stoich tomorrow.