Today we showed various objects under the infrared camera, and discussed how an object’s emissivity impacts the absorption and emission of thermal radiation. But, an object which absorbs well in the visible spectrum—something that appears black—doesn’t seem to emit well in the visible—after all, it appears black. Therefore, knowing which parts of our experience to use to decide on an object’s emissivity is a bit subtle.
We began looking at thermal radiation during class today, and there are lots of great demonstrations and resources based around this topic. But, between the youtube video, the infrared camera, the kettle, the nail burning demo, the doc cam, my computer, two projectors, and the clicker, I had many balls to juggle during class today. Therefore, I wasn’t so smooth in all the transitions.
Helping out a colleague in need, I subbed in a second class today, and so I spent 1.5 h interacting with 200 new faces. But, the students in that class also saw a new face (mine). Therefore, there was some respect and tentativeness on both sides.
The Fall semester is long, and there is no Fall reading break at our institution. But, there are long weekends, and we’re currently on the verge of another one, to be used for some rest and recharging. Therefore, I’m feeling a bit tired but also unhurried.
When in class, I feel high energy, and as a result I do lots of moving around when speaking. But, pacing while talking can be perceived as nervousness. Therefore, I’ve been conscious about trying to plant myself in one spot when making important points.
I sat in on the class immediately before my own because it’s interesting to watch others teach to observe their habits, and those of the students. But, the one thing that is most useful is the empathy I develop for the student perspective: The view from the back looking forward is much different than the view from the front looking out. Therefore, I made sure to touch base with some of those who sit at…
8am class sometimes feels early, and especially so as winter sets in and the mornings start being colder. But, on the weekend I saw a suggestion in a magazine from our own Prime Minister: If you take morning classes in university, then you’ll be up early and have more afternoon time for studying, friends, and other activities. Therefore, I shared with my class that they made a JT-approved choice to be there in the morning.
Proportional reasoning is when some variable in your equation scales by a factor, and you have to figure out how something else has to scale as a result. But, many students at this level struggle with this advanced skill. Therefore, we went through a proportional reasoning example in detail.
Class has been running smooth now, and we’ve just finished week 9 of 13 in the semester. But, today, two young gentleman dressed in grass skirts and carrying little drums walked through the room, banging on their bongos. Therefore, we had a bit of interruption, confusion, and laughter.
I decided to sit in on a bit of the other instructor’s lecture in my same course, and I watched them run an activity which I did last week. But, instead of plugging the numbers that came out into a spreadsheet, they handwrote them and then calculated the average. Therefore, I was pushed to reconsider how I might get a bit more personal and explicit in my class.