Since 1982, 44 CORE (COntent-driven Reform in Education) Institutes have brought more than 2,200 high school and middle grades teachers in biology, chemistry, environmental science, history, mathematics, physical science and physics to Princeton and Rutgers-New Brunswick. From 1997 through 2000, the Howard Hughes Medical Institute and the National Science Foundation are funding, respectively, biology and environmental science institutes for middle grades and high school teachers. COntent-driven Reform in Education (CORE) institutes are intensive, residential, summer institutes that provide teachers the opportunity to sharpen knowledge, work with researchers, and network with colleagues from around the country.