Professor Daniel Willingham describes why content knowledge is essential to reading with comprehension, and why teaching reading strategies alone is not sufficient that students read with good comprehension.

Edit: March 12, 2016. About the silence at the end...there used to be music there, which I pulled from the Web, as it was Creative Commons (educational use). Then the publisher revoked the license w/o telling me and put an ad on this video. So I chucked the music.