Category: Society

Poll: The Peter Threshold

As a sort of follow-up to yesterday’s post asking about incompetent teachers, a poll on what you might call the “Peter Threshold,” after the Peter Principle. Exactly how many incompetent members can an organization tolerate? The acceptable level of incompetence in any organization (that is, the fraction of employees who can’t do their jobs) is:Market… Continue reading Poll: The Peter Threshold

How Many Incompetent Teachers Are There, Really?

As mentioned in the previous post, there has been a lot of interesting stuff written about education in the last week or so, much of it in response to the manifesto published in the Washington Post, which is the usual union-busting line about how it’s too difficult to fire the incompetent teachers who are ruining… Continue reading How Many Incompetent Teachers Are There, Really?

“Line Plot” is Never the Right Choice (Why Excel Sucks, aleph-nought in a series)

There have been a bunch of interesting things written about education recently that I’ve been too busy teaching to comment on. I was pulling them together this morning to do a sort of themed links dump, when the plot at the right, from Kevin Drum’s post about school testing jumped out at me. This shows… Continue reading “Line Plot” is Never the Right Choice (Why Excel Sucks, aleph-nought in a series)

Relativity, Quantum, and the Internet

When Kate and I were walking Emmy last night, we were talking about the historical development of relativity. As one does, when walking the dog. I mentioned a couple of the pre-1905 attempts to explain things like the Michelson-Morley experiment, and how people like Lorentz and FitzGerald and Poincare were on the right track, but… Continue reading Relativity, Quantum, and the Internet

Worst. Evaluation Scheme. EVER.

Speaking of teacher evaluation schemes, as we were, Doug Natelson draws my attention to a new proposal from Texas A&M: [Frank] Ashley, the vice chancellor for academic affairs for the A&M System, has been put in charge of creating such a measure that he says would help administrators and the public better understand who, from… Continue reading Worst. Evaluation Scheme. EVER.

Teacher Evaluation and Test Scores, aleph-nought in a series

There’s been a lot of energy expended blogging and writing about the LA Times’s investigation of teacher performance in Los Angeles, using “Value Added Modeling,” which basically looks at how much a student’s scores improved during a year with a given teacher. Slate rounds up a lot of reactions, in a slightly snarky form, and… Continue reading Teacher Evaluation and Test Scores, aleph-nought in a series

Nobody Ever Remembers Being a Cow

There was a deeply silly New York Times article about “Past Life Regression” over the weekend: In one of his past lives, Dr. Paul DeBell believes, he was a caveman. The gray-haired Cornell-trained psychiatrist has a gentle, serious manner, and his appearance, together with the generic shrink décor of his office — leather couch, granite-topped… Continue reading Nobody Ever Remembers Being a Cow

The Cromartie Conundrum, the Foreman Solution, and the Chamberlain Estimate

New York Jets cornerback Antonio Cromartie is getting mocked for a clip where he takes some time to name all his children (the clip isn’t as bad as the description makes it sound– he’s slow, but he doesn’t struggle all that badly). Cromartie claims that HBO manipulated the footage to make him look bad. Of… Continue reading The Cromartie Conundrum, the Foreman Solution, and the Chamberlain Estimate