Dylan Wiliam (@dylanwiliam) 's Twitter Profile
Dylan Wiliam

@dylanwiliam

Teacher, researcher, writer, mostly interested in the power of education to transform lives and how to do it better.

ID: 18973501

linkhttp://www.dylanwiliam.org calendar_today14-01-2009 11:28:28

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Dylan Wiliam (@dylanwiliam) 's Twitter Profile Photo
Dylan Wiliam
@dylanwiliam

15 hours ago

A review of studies of professional development in math and science finds a 1 sd increase in teacher knowledge is associated with a non-significant increase of 0.08sd in student achievement, though a 1 sd increase in instruction quality has 3x the effect: bit.ly/4kDfyHg