1. Children's Ability to Formulate Mental Models to Explain Natural Phenomena
2. An experiment in validating objectives for the curriculum in elementary school science
3. and , The Use of Static and Dynamic Mechanical Molds in Teaching Aspects of the Theoretical Concept the Particle Nature of Matter, Tech. Rpt. 20, Wisconsin Research and Development Center, Madison, 1967.
4. National Assessment of Science Education-A Beginning, in National Assessment of Educational Program Report 1-Science: Observations and Commentary of a Panel of Reviewers, Education Commission of the States, Denver, 1970, 14–23.
5. , and , The Correction of General Science Misconceptions as a Result of Feedback Mode in Computer-Assisted Instruction, presented at the Annual Meeting of the National Association of Research in Science Teaching, Minneapolis, 1970.