Day 61: Mistakes Whiteboarding, Impulse Problems, & Designing Experiments

AP Physics 1: Mistakes Whiteboarding

Students did some mistakes whiteboarding with yesterday’s problems. A few students said they feel like unbalanced forces are easier than balanced, which I made sure to point out is a great indicator of how much they’ve grown in using free-body diagrams and vector addition diagrams.

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Physics: Impulse Problems

Students worked on some problems using yesterday’s results on impulse. Overall, the problems seemed to go well, but I need to think about how to handle whiteboarding. I’ve got one section of 30, where I’ll be able to handle whiteboarding the way I normally would. My other section is only 8 students, and they ended up gathered around a single table having a lot of great discussion about how to do the problems. I’m not sure how much a whiteboarding session will add to their understanding.

Chemistry Essentials: Designing Experiments

We spent some time talking about the graphs I made of yesterday’s lab results, then moved on to starting the next set of mass and change labs. I asked students to plan their own procedure for finding the change in mass for sugar dissolving in water and Alka-seltzer dissolving in water. This turned out to be harder than I expected, so we ended with some whole-class discussion to figure out what steps we needed and why.

Day 60: Problems, Board Meeting, & Conservation of Mass

AP Physics 1: Problems

Students worked some unbalanced force problems. The set I gave them is mostly what I call “alphabet soup problems”, were there are only variables, no numbers. My students still get nervous about those problems, but they did very well with them, nonetheless. They are also starting to feel more comfortable relying on diagrams to set up their math, which is fantastic and lead to some great conversations during the problems today.

Physics: Board Meeting

We had our board meeting for yesterday’s impulse lab. The results were the best I’ve seen with this lab to-date, which was great to see. My students this year are more comfortable with the LabQuests than the students I had last year and I spent significantly more time on the pre-lab discussion than I had in the past, and the result was a lot more groups than usual where their slope came convincingly close to the mass of their cart.

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Chemistry Essentials: Conservation of Mass

Today students looked at the change in mass in two scenarios, ice melting into water and two liquid solutions getting mixed together. As soon as I started to preview the lab, students started sharing their predictions for what would happen to the mass completely unprompted, so I decided to take a few minutes to let them discuss their predictions. I planned to have students get the initial mass of the ice, then work on mixing solutions together while the ice melted, but it turned out to be challenging for a lot of students to shift between two different experiments. I think it may be better to just use hot plates to help the ice melt so students can do one scenario completely before shifting to the other.

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Day 59: Board Meeting, Impulse, & Particle Diagrams

AP Physics 1: Board Meeting

We had a board meeting for yesterday’s lab on Newton’s 2nd Law. Overall, students got very nice results and were very successful at making sense of what they saw.

Physics

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This group added some notation to their graph to find the units on their slope

Physics: Impulse

Students used an elastic string to tie a cart to a force sensor in order to find a relationship between the cart’s change in velocity and the area of the force vs. time graph. I’ve tried this lab a few times without great results, so spent a lot more time on the pre-lab than I had in the past and its looking like results will come out fairly nice.

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Chemistry Essentials: Particle Diagrams

Students looked at the change in mass as they spread out a piece of steel wool and started drawing particle diagrams. My co-teacher and I agreed we want to ramp up the graph interpretation in the course, so we made a histogram of the class results and spent a fair amount of time discussing them. Students had some great observations about the graph.

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Day 58: N2L, Momentum Intro, & Mystery Tubes

AP Physics 1: Newton’s 2nd Law

Students worked on collecting data for a relationship between force and acceleration. It was a lot of fun to see students able to just dive right in to a lab like this; it was a good reminder of the growth students have made so far this year.

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Physics: Momentum Intro

Students worked on a lab my colleague came up to introduce momentum. Students caught a cart at the bottom of the ramp, then came up with as many ways as they could to make it tougher to catch the cart, similar to the chalk smashing analogy used in the Physics Union Mathematics curriculum to introduce energy.

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Chemistry Essentials: Mystery Tubes

This trimester, I’m re-teaching the first half of the course to a brand-new group of students. We started today by getting out the mystery tubes. There was a lot of great conversation, both in small groups and in the whole-class, which was a lot of fun, especially since we really struggled to get that in the class last trimester. I’m really excited for this group of students.

mystery tube

Day 57: Reflections on Tri 1

Today was day 2 of final exams, so its a good time for me to reflect on how the year is going so far.

One thing I’ve been thinking about the past few weeks for all of my classes is how to communicate learning targets to my students in a way they find meaningful. This year, for the first time, I’ve had students tell me they find it confusing to be told a test is about a specific learning target, rather than a chapter or unit, even when I include the text of the learning target. My district has a policy that teachers should post learning targets, and administrators check for compliance during observations, and I think its become a box to check in enough classrooms that students glaze over the text. I’m thinking about what I could do differently to help students find more meaning in the learning targets.

AP Physics 1

I’ve been struggling more with class culture this year than I have with the course in the past. I’ve got some great students, but each section has some things that are making it tough for me to build a good culture. One of my sections has 36 students, while all my previous sections of AP have been 25 or less. I’m really excited that more students signed up for the course in the past, but I’m not able to spend as much time with each group as I typically do. I’m also not seeing as much interaction across groups as I’ve seen in the past, and I think the class size is a factor in that. I usually let students pick their groups, but I’m thinking it may be worthwhile to do some random grouping to encourage more cross-group interactions during labs or problems. That may also help with the fact that I can’t spend as much time with students as I’d like; if a student I’ve spent some time coaching visits another group to help, that might magnify the impact of the time I spend coaching individuals or small groups.

Physics

Last year, we really struggled with getting students to interact effectively. As a result, the other physics teacher and I agreed to put significant focus on teaching students to collaborate effectively. We’ve been assigning random groups that change almost every day, we started the year assigning roles within each group, and we have been including some kind of reflection on scientific abilities, including collaboration, on every packet. As a result, students are getting much more out of their time in small groups than last year and there is a much better class culture.

One of the problems I ran into last year is I took for granted that students had already learned how to be an effective student in a physics class, even if they had the other physics teacher, since we are very in-sync. However, students who came to me from the other teacher did not automatically transfer skills from their other physics class and students had been shuffled enough between sections that there was not a good sense of community. This year, I will be keeping that in mind and plan to return to the structures and strategies I used to teach how to be a physics student back in September to try for a smoother transition.

Chemistry Essentials

This year, I am co-teaching the course with a special education teacher for the first time, and it has been a great experience. Not only does my co-teacher have some background in chemistry, but we have very similar beliefs about what a science class should look like and accomplish, which means we can focus on how to effectively teach our students, rather than on navigating conflicting perspectives. So far, I’ve lead the majority of the whole-class instruction, but we both move between groups supporting students during small-group work. Since next trimester will be a repeat of this one, but with different students, we are planning to split much more of the direct instruction.

Last year was my first time teaching the first trimester of the course, so this year I’ve been making more significant modifications to the curriculum. I brought in a lot more graph interpretation to develop new concepts, and found students really struggle with reading graphs and identifying important features. Going into tri 2, my co-teacher and I are thinking about ways to do a much better job of teaching those skills to scaffold students toward meaningful graph interpretation.

Day 56: Final Exams

Today was our first day of final exams.

AP Physics 1: Practice Exam

I don’t actually have any AP Physics sections until tomorrow, but they will be taking roughly half of a practice exam. I trimmed it to fit into the 90 minute blocks we have for final exams, rather than 3 hours, as well as to limit it to material we’ve covered so far this year.

Physics: Lab Practical

Students took an individual final, then completed the “Catch the Loot” practical in small groups. Time was tight, so I didn’t have any groups today that were able to test their calculation. Given how satisfying this result is, it will be worth looking at how to adjust the timing if we repeat this lab next year. A lot of students will switch hours when the new term begins Monday, with many students even switching between me and the other physics teacher, so unfortunately it won’t be practical to give them the opportunity to try their prediction when the new term starts Monday.

 

Chemistry Essentials: Density Practical

Students took a short individual test, then did a density practical in groups. After finding the volume of a cylinder turned out to be a major barrier for a lot of students on a lab in September, I ordered some plastic centimeter cubes thinking they might make the lab more accessible. I decided the final would be a good opportunity to test out using them for the density lab and the results came out very nicely.

Day 55: Practicals, Multi-Model Problems, & Whiteboarding

AP Physics 1: Practicals

To review for final exams, I set up a couple of different lab practicals and let students choose which combination they’d like to work on.

Physics: Multi-Model Problems

Students worked on some problems that required them to use multiple models to prepare for the final exam. Last spring, the other physics teacher and I talked about trying to do a better job of spiraling content and, while we’ve taken what I consider some good steps, I could tell this is something we still need to improve on based where I saw students struggling today.

Chemistry Essentials: Whiteboarding

Each group picked a section of the review to be the class experts on. They white boarded their answers to the revenant problems and answered questions from classmates who were stuck on that section. The students who made use of the time seemed to leave feeling very good about the review.

 

Day 54: Model Summaries & Review

AP Physics 1 & Physics: Model Summaries

In both courses, I started the review by asking students to whiteboard model summaries for what we’ve covered so far this year. I asked them to sketch examples of the main diagram types, key formulas we used, and anything else they thought was important. It helped to frame each model as a tool kit and the model summary as a reminder of what tools are in each kit.


 

Chemistry Essentials: Review

In this class, I stuck with a pretty traditional review with a selection of problems from each topic so far this year.

Day 53: Day Before Break

Today was the last day to submit work or complete retakes before the end of the term and our last day of classes before Thanksgiving break, so it was a very chaotic day.

AP Physics 1: Whiteboarding

Students wrapped up presenting the whiteboards from yesterday. There was some really great discussion, with students making use of the matter model and connecting to the collisions we’d tested out a few days ago.

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Physics: Whiteboarding

This class also worked on wrapping up whiteboarding some problems. My 6th hour had a really tough time focusing, which was not surprising the last hour of the day before a break. While we still got where we needed to, I don’t think a whiteboard discussion of problems was the right call for today.

Chemistry Essentials: Quiz

Students took their quiz on naming and formula writing for ionic and covalent bonds. Since it was fairly short, we spent some time before the quiz whiteboarding a few practice problems. A few students were focused on last-ditch efforts to raise their grade, and it was tough to re-direct them to the day’s activities. This will be something to think about at the end of next trimester.

Day 52: Mistakes Whiteboarding &Binary Compounds

AP Physics 1: Mistakes Whiteboarding

We started looking at some force problems involving Newton’s 3rd Law by doing some mistakes whiteboarding. There was a lot of good discussion on the directions of normal forces in problems where the normal doesn’t just go straight up.

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Physics: Mistakes Whiteboarding

This class also did mistakes whiteboarding, even with the same problems as in AP. Once again, there was a lot of good discussion on the direction of the normal forces.

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Chemistry Essentials: Binary Compounds

Students practiced translating between names and formulas for binary compounds. Most students took to this pretty quickly and easily, which was great to see.