Improved Learning in a Large-Enrolment Physics Class - a 3 hour lecture by an excellent lecturer compares very unfavourably with a 3 hour problem based session given by a novice. Each group had over 200 students. DOI: 10.1126/science.1201783. http://tinyurl.com/3quug6n By Louis Deslauriers, Ellen Schelew, and the nobel prize winner Carl Wieman. - http://www.webcitation.org/mainfra...