MIT Physics Professor Walter Lewis "All of you have now lost your virginity... in Physics!" (interview)

Here you have a set of 3 videos showing how MIT Professor Walter Lewin use to give his lessons.
All of them are in English with subtitles in Spanish.
The first one is an interview where he explains his methods and the other ones  are  lessons about  measurement of  space and time

Interview
Measurement of space and time





There are some more examples uploaded in You Tube, just have a look.