The Full Option Science System (FOSS) is a K-8 science curriculum developed at the Lawrence Hall of Science, University of California at Berkeley. The Publishers website includes correlations to national and state standards available on the website. The FOSS program materials are designed to meet the challenge of providing meaningful science education for all students in diverse American classrooms and to prepare them for life in the 21st century. FOSS is also an ongoing research project dedicated to improving the learning and teaching of science. Development of the FOSS program was, and continues to be, guided by advances in the understanding of how youngsters think and learn. Supported during its development by the National Science Foundation, one link is to the publisher's website and another is to the project site.