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March 24 – 29, 2010. Choi, K, Kim, S. W., Lee, H., Krajcik, J. Re-Conceptualization of Scientific Literacy for the 21st Century in Korea. Paper presented at the National Association for Research in Science Teaching, Philadelphia, PA, March 24 – 29, 2010. Stevens, S. Y., Shin, N., & Krajcik, J. S. (March, 2010). Progress toward the development of an empirically tested learning progression for the nature of matter. Paper presented at the National Association for Research in Science Teaching Annual Conference, Philadelphia, PA Merritt, J. & Krajcik, J. S., 2009. Developing A Calibrated Progress Variable For The Particle Nature Of Matter, Paper presented at the Learning Progressions in Science (LeaPS) Conference, June 2009, Iowa City, IA. Krajcik, J. S., Shin, N., Stevens, S. Y., & Short, H. (April, 2009) “Using Learning Progressions to Inform the Design of Coherent Science Curriculum Materials.” Paper presented at American Educational Research Association, San Diego, CA. Krajcik, J.S., Fogleman, J. , Sutherland, L., Finn, L.(2008) Professional Development That Supports Reform: Helping Teachers Understand and Use Reform-Rich Materials. Poster presented at the Annual Meeting of the American Educational Research Association, New York: NY. Krajcik, J.S. Catalyzing Change in Science Instruction: Big Ideas in Nanoscience. Presentation at the National Science Teacher Association Annual Meeting, Boston, March 27 - 30, 2008. McNeill, K.L. & Krajcik, J. (2007, April). Relationship between teacher instructional practices and curricular scaffolds in supporting students in writing scientific explanations. Paper presented at the annual meeting of the American Educational Research Association, Chicago, Il. Merritt, J., Shwartz, Y., & Krajcik, J. (2007). Middle school students' development of the particle model of matter. Paper presented at the Annual Meeting of the National Association of Research in Science Teaching, New Orleans, LA. Yonker, M., Sabelli, N., Giordano, Krajcik, S. (2007). Identifying the Big Ideas in Nanoscience. Symposium presented at the Annual Meeting of the National Association of Research in Science Teaching, New Orleans, LA. Shi, S., Sabelli, N., Krajcik, J., Tinker, R. & Ellenbogen, Kirsten, 2006. Learning at the Nanoscale: Research Questions that the Rapidly Evolving Interdisciplinarity of Science Poses for the Learning Sciences. The International Conference of the Learning Sciences, June, 2006, West Lafayette, IN. McNeill, K., Krajcik, J. (2006). Supporting Students’ Construction of Scientific Explanation Through Generic Versus Context-Specific Written ScaffoldsIn Reiser, B., Supporting the Practices of Argumentation and Explanation in Middle-School Classrooms. Symposium conducted at the Annual Meeting of the American Educational Research Association, April 7 – 11, San Francisco, CA. Blumenfeld, P., Krajcik, J., Kempler, T., Geier, R., Kam, R., & Gallagher, S. (2006). Opportunity to learn: Teacher instructional practices that account for variation in achievement in project based science in urban middle schools. Paper presented at the American Education Research Association, San Francisco. Krajcik, J., McNeill, K., & Reiser, B (2006). A Learning Goals Driven Design Model for Developing Science Curriculum. In Linn, M., Measuring and Teaching Science Inquiry: Four Perspectives. Symposium conducted at the Annual Meeting of the American Educational Research Association, April 7 – 11, San Francisco, CA. Krajcik, J. & McNeill, K. L. (2006, April). Designing middle school science curriculum materials to foster students’ developing deep understanding of key learning goals. Paper presented at the annual meeting of the National Association for Research in Science Teaching, San Francisco, CA. Krajcik, J. (2006). In, Duschl, R., Inquiry and the Learning of Science-Theories and Practices. Symposium conducted at the Annual Meeting of the American Educational Research Association, April 7 – 11, San Francisco, CA. Krajcik, J. & McNeill, K. L. (2006, April). Designing middle school science curriculum materials to foster students’ developing deep understanding of key learning goals. Paper presented at the annual meeting of the National Association for Research in Science Teaching, San Francisco, CA.