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Teachstone's Affiliate Trainer Blog

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Teachstone's guest bloggers come from many backgrounds including teaching, education policy, and research. If you are interested in writing a post please fill out the form on our guest blog application page.

Recent Posts

How Your Participants can Avoid "Drift" in CLASS Observations

17 Nov 2016

I have been a CLASS observer and trainer for several years now and I’ve been thinking about the concept of “drift.” Drift happens to people who have passed the reliability test, but over time they start scoring subjectively—they let their biases affect the data.

Topics: Trainer Tips Read More

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