In the spring of 1999, the Board of the National Association of Research in Science Teaching (NARST) established an Informal Science Education Ad Hoc committee, co-chaired by Lynn Dierking and John Falk. The Committee's task was to focus on the organization's positioning in regard to out-of-school science education. After 2 years of work, the committee composed a policy statement, included below, that was presented to, and accepted by, the NARST board. The policy statement defines this arena of research, describes a variety of out-of-school environments in which science learning occurs