Brian J. Reiser is Professor of Learning Sciences in the School of Education and Social Policy at Northwestern University. Professor Reiser served as chair of Northwestern’s Learning Sciences Ph.D. program from 1993, shortly after its inception, until 2001. His research focuses on the design and enactment of learning environments that support students’ inquiry in science, including both science curriculum materials and scaffolded software tools. His research investigates the design of learning environments that scaffold scientific practices, including investigation, argumentation, and explanation; design principles for technology-infused curricula that engage students in inquiry projects; and the teaching practices that support student inquiry. Reiser co-directs the IQWST (Investigating and Questioning our World through Science and Technology) curriculum project, a collaboration with the University of Michigan to develop middle school standards-based science curriculum materials that engage students in learning science through inquiry projects. Professor Reiser also directed BGuILE (Biology Guided Inquiry Learning Environments) to develop software tools for supporting middle school and high school students in analyzing data and constructing explanations with biological data. Reiser is a co-principal investigator in the NSF Center for Curriculum Materials in Science. He recently served as design team member for the NRC’s Committee on Test Design for K-12 Science Achievement. Professor Reiser received his Ph.D. in Cognitive Science from Yale University in 1983.