Marcia C. Linn (née Cyrog) is a professor of development and cognition specializing in education in mathematics, science, and technology in the Graduate School of Education at the University of California, Berkeley. Since 1970 she has made significant contributions to the understanding of how computers and technology can be used to support learning and teaching in mathematics and science. Her CV (available at her homepage) includes an extensive list of presentations and published books, articles, and peer reviewed papers in science education and education technology.