Online Learning: Notes from Day 1

I held my general relativity course over zoom. It was mostly review lecture slides with clicker questions to break it up. We had a collaborative whiteboard set up as well. Everything went ok. Things were are little clumsy and awkward, as getting a feel for the flow and pacing will take time. There were only six of us, which made things easy to discuss and collaborate without having to use polling or breakout rooms.

The good thing is that all students showed up and technology worked. We debriefed at the end to talk about how it went and what changes we need. On Wednesday, we are doing collaborative problem-solving, so I’m curious how that will go. It was defiantly harder to get a feel for the class… I need to establish some useful and transparent learning routines.

My back didn’t like sitting that long. I may need to figure out a standing desk situation, or just get up frequently, or get a better chair.

Today, I am meeting with intro physics for the first time as a large group. I have had some small group or 1-to-1 soon meetings with about a quarter of my class, just informally as tests of technology and just checking in with students. Today is just a review day.

This is just to say

I’m here.

Wishing you all well.

Today, we start remote delivery of physics instruction. I’ll hopefully have more to say once I’m back in the mix with students and their learning.

Last week we had no classes and our family daycare was closed. Our home is too quiet without the hum of play.

Waves Clicker Question

Students were struggling with a homework question about waves that asked them to determine what the “snapshot” graph (displacement vs position along string at a given time) would look like based on the “history” graph (displacement vs. time for a given location on the string.

Here are two clicker questions I wrote to get us thinking and talking critically about it in class. This sequence of questions and discussion took 20-25 minutes, which was more than I was expecting, but there was a lot of productive struggle.

Among many rich points of conversation, three key points of confusion and insight were

Argument 1: Time on the history graph is always read from left to right, but events on a snapshot graph with a left traveling wave occur from right to left. So the shape should be opposite, since time is proceedings in different directions on the two graphs.

Argument 2: Whatever the source does first gets a head start on the wave, and so should be “out” in front, which way the wave is traveling.

Argument 3:  We know each point on the graph goes up and then down. This means if you are at further down the string that the current snap shots shows (which hasn’t yet gone up or down yet), the closest part of the pulse needs to be an up part, because you are staring at what’s about to happen too you as it approaches you.

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Links for January Chattanooga Workshop

I.  Workshop Materials

II.  Physics Classroom Resources

III. Resources

AJP Article describing Circuits Approach that Emphasizes Electric Potential

CASTLE-specific Resources

Bulbs and Batteries Approaches:

 Teaching Circuits with Multiple Batteries:

Power Boxes:  Paper

IV.  Other Links

Example Color Coding and Potential vs Path Graphs:





Drafts of Various Card Sorts for Reasoning about Algebraic Relationships

I’ve been slowly working on some tasks for supporting algebraic reasoning about proportional relationships, inverse relationships, and quadratic relationships. We’ve been noticing that we really  need to better support this in the 1st semester so that when it becomes more serious in 2nd semester, students have had more practice.

Anyway, this is just a dump of various drafts. Mostly they are intended to be Ranking tasks (like TiPERS but in a card sort format). I can imagine using some of additional the matching cards as scaffolding. I probably wouldn’t include them all the time, but it might make sense early on.

I have others in the mix, but I just wanted to share at least some to let people see.

Given Force and Mass: Rank by Acceleration

Screen Shot 2019-11-19 at 1.40.06 PMScreen Shot 2019-11-19 at 1.40.12 PM

Given Distance and Time: Rank by Speed

Screen Shot 2019-11-19 at 1.39.50 PMScreen Shot 2019-11-19 at 1.39.55 PM

Given Speed and Mass: Rank by Momentum and then by Kinetic Energy

Screen Shot 2019-11-19 at 1.40.20 PM

Given speed and acceleration: Rank by Duration (then Distance)

Screen Shot 2019-11-19 at 1.41.09 PM

For Circular Motion: Rank by Net Force, Acceleration, Period

Screen Shot 2019-11-19 at 1.40.30 PM

Given speed and time: Rank by Distance

Screen Shot 2019-11-19 at 1.40.47 PM

Rank by Change in Momentum

Screen Shot 2019-11-19 at 1.40.36 PM

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