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2. A cross age study of the understanding of five chemistry concepts;Abraham;Journal of Research in Science Teaching,1994
3. Effectiveness of multimedia-based instruction that emphasizes molecular representations on students' understanding of chemical change;Ardac;Journal of Research in Science Teaching,2004
4. Using static and dynamic visuals to represent chemical change at the molecular level;Ardac;International Journal of Science Education,2005
5. Bodner, G.M., Does the assessment of conceptual understanding require a different format for test questions? presented at Novel Methods of Teaching Chemistry, Puerto Rico Alliance for Minority Participation, San Juan, PR, 27 February, 1997.