The Woodrow Wilson conference in Columbus featured some inspiring sessions. My favorite was presented by David Johnson, a Fellow teaching a flipped classroom near Indianapolis. In its purest implementation, a flipped classroom has students watching instruction at home, and doing homework at school. The teacher is then able to circulate among the students. To make this happen, you need a way to deliver instructional material at home. YouTube is convenient, but since internet access may not be available for all of your students, you could distribute DVDs. Typically, the classroom will also have some means for showing the instructional material.
Katie Gimbar has a nice presentation describing the process. If you've heard of the flipped classroom before, then you've likely also heard that it's a great way to use content like Khan Academy, with the teacher providing the missing personal link. However, Katie says that the content must be produced by the teacher (in short segments) to convince the student that they need to listen. While this places an upfront burden on the teacher, consider this: while the video is being replayed for some students, you are helping others. And considering that you likely have multiple classes with the same prep, the content is reused. This eliminates the "did I already show you this?" dilemma. If you are teaching four sections of Algebra 1, it would be nice to turn the discussion over to YouTube. Imagine being able to carefully observe your students while your digital self is presenting a short lesson.
These two chemistry teachers have several videos showing how they flipped their classroom. They have polished their content, and as one of them says, "we have not lectured in six years."
There is a very active Twitter hashtag, #flippedclass. If you have a Mac, you can get the Twitter app for free from the App Store app.