Elby’s current research explores science students’ and teachers’ epistemologies—their views about what counts as knowledge and knowing in various contexts—and the effects of those epistemologies on their teaching and learning. Elby has a long record of teaching, teacher professional development, and education research. He taught high school physics for several years in California and Virginia. He is currently co-chair of the AP Physics Curriculum Development and Assessment Committee. Elby earned his MA in Education and his PhD in Physics from the University of California, Berkeley.