1. Pilot study
2. Elson D. K. and Thomas J. Computer science hold the computer: Designing optimal algorithms for creating peanut butter and jelly sandwiches. Published by Technology Integration Partnerships Columbia University. Accessed September 7 2006 at http://tip.columbia.edu/index.phpoption=com_content&task=view&id=104&Itemid=54 Elson D. K. and Thomas J. Computer science hold the computer: Designing optimal algorithms for creating peanut butter and jelly sandwiches. Published by Technology Integration Partnerships Columbia University. Accessed September 7 2006 at http://tip.columbia.edu/index.phpoption=com_content&task=view&id=104&Itemid=54
3. Fellows M. Bell T. and Witten I. 2002. Computer Science Unplugged. Fellows M. Bell T. and Witten I. 2002. Computer Science Unplugged.
4. Computer science through the eyes of dead monkeys
5. Extended analogy