The Test(ing) of Time 2: Freezing Time

A month and a half ago, I reported on a simple experiment to measure the performance of a timer from the teaching labs. I started the timer running at a particualr time, and over the next couple of weeks checked in regularly with the Official US Time display at the NIST website, recording the delay […]

Practice Matters: “The effect of curriculum on Force Concept Inventory performance: A five thousand student study”

A few years ago, we switched to the Matter & Interactions curriculum for our introductory classes. This has not been without its hiccups, among them the fact that there has been a small decline in the conceptual learning gains measured by the Force Concept Inventory, the oldest and most widely used of the conceptual tests […]

The Test(ing) of Time: Measuring the Performance of a Stopwatch

As I’ve mentioned before, I’m schedule to teach a class on “A Brief History of Timekeeping” next winter term as part of the Scholars Research Seminar program. Even though I have a hundred other things to do, I continue to think about this a lot. One of the goals of the course is to introduce […]

Notes Toward “A Brief History of Timekeeping”: Kooks and Sticks

Barring a major disaster, I am scheduled to teach one of our Scholars Research Seminar classes next winter. I’ve been kicking the idea for this around for a while, with the semi-clever title “A Brief History of Timekeeping.” The idea is to talk about the different technologies people have used to mark the passage of […]