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### Unit Tutor

ct

units

physics

js

I’ve had this idea for years to make a unit-conversion calculator tool for use by students as they are learning dimensional analysis and unit conversion. I was imagining tile cards showing quantities and conversion factors that they could move around on the page, snapping them into a “picket fence” style grid, flipping them over to form reciprocals, automatically showing unit cancellation, and displaying the result of a unit-ful multiplication with the resulting units at the push of a button.

### Labelling Demo

ct

labelling

students

education

In the high school class I teach about AI and the Future, I’ve been struggling to figure out which concepts we’ve covered the students really get and which they don’t. In my physics and math classes I have an easier time with this formative assessment, because at least some of what I want from them is the ability to perform certain skills. So I assess those skills and I have some (imperfect) sense of what I need to do next.

### Four Circles

circle

geometry

trigonometry

algebra

problems

construction

safety

letting go

I showed the hole in the floor solution to the colleague who had told me about the problem yesterday– he was really pleased with the answer. The key insight for him was the solution to the simple harmonic oscillator differential equation, which, as a math person, he wasn’t familiar with. Another colleague saw the problem and had to get in on the act, so he proposed this problem, which I worked on for much of the day.

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