Search Results       Your search for [subject]Science -- Study and teaching -- Aids and devices -- Purchasing -- United States returned 1 record.           Selecting instructional materials : a guide for K-12 science. Washington, D.C.: National Academy Press, 1999. Subject: Science -- Study and teaching -- United States -- Aids and devices; Science -- Study and teaching -- Aids and devices -- Purchasing -- United States.          Add to Book Cart Relevance: 36.43%