Category Archives: Education

Reliability and VAM

One of the problems of using value-added measurement (‘VAM’) to assess individual teachers is the imprecision of these estimates. Brad Lindell explains the problem in testimony in a New York case challenging teacher assessment: If the same test-retest reliability from … Continue reading

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How You ‘Pre-Treat’ Your Data Really Matters (It’s Not the P-Hacking)

There’s an 538 article “Science Isn’t Broken” that’s winding its way through the tubes of the internet. It has a cool ‘p-hacking’ interactive feature, which is probably why most of the associated commentary has focused on the problem of p-hacking … Continue reading

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VAM-Based Teacher Evaluation Collides With the Legal System

And if the judge’s questions are any indication, VAM-based teacher evaluation gets hit and dragged a couple hundred yards (boldface mine): Lederman’s suit against state education officials — including John King, the former state education commissioner who is now a … Continue reading

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Someone Needs to Ask Jeb! Bush About Pinellas County Schools

There’s a very tragic story about the collapse of the Pinellas County, Florida public schools that is a must-read article. There’s too much in there for me to do it justice, but two things come to mind: 1. We can’t … Continue reading

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Understanding the Limitations of Your Data: At-Risk Versus Low-Income

A while ago, I described how decisions about how to treat your data can have significant effects on your results–effects that can be as profound as, if not greater than, p-value tweaking. So a preliminary analysis of the effects of … Continue reading

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The Accidental Genius of School Lotteries: The D.C. Edition

By way of Greater Greater Washington, we come across this figure, showing a very tight relationship between housing values and reading proficiency: The one real outlier, Garrison Elementary is in a rapidly gentrifying neighborhood (in real dollar values, housing prices … Continue reading

Posted in DC, Education | 2 Comments

Arne Duncan: Education Reform For Thee, But Not For Me

I’ve noted before how the Chicago-based school reformers that are a key component of the Obama Administration send their kids, not to schools full of reformy goodness, but to schools that have policies which are the exact opposite of said … Continue reading

Posted in Education