| Readers may be
familiar with Harvard physicist Eric Mazur's ConcepTests, which have been shown to enhance substantially the comprehension of introductory physics concepts.
Conceptual questions are posed to students in the lecture room along with a few possible answers. Students vote on the possible answers, then discuss their answers with their neighbors in the lecture room; a second vote is then taken.
This form of peer instruction can not only be an effective pedagogical method, it also provides the instructor with immediate feedback as to how well the class is following the lecture. | 
