1. Force concept inventory
2. A version of (1) revised in 1995 by I. Halloun R. Hake E. Mosca and D. Hestenes is available in (4).
3. Huff D., How to Lie with Statistics (Norton, New York, 1954).
4. Mazur E., Peer Instruction: A User's Manual (Prentice Hall, Upper Saddle River, NJ, 1997).
5. Why Peer Discussion Improves Student Performance on In-Class Concept Questions