As science gets squeezed in the elementary curriculum, at least two Florida districts are trying a new approach to keeping hands-on lessons a part of pupils' experiences. This article reports how Broward and Palm Beach county districts have increased the number of science specialists working in their elementary schools--teachers who, like physical education and music teachers, work with students at all levels once or twice weekly. Instead of replacing science instruction in the regular classroom, districts officials say, the specialists reinforce the science lessons taught by regular teachers by conducting experiments that too often get dropped because of a crowded school day. However, the use of science specialists--or resource teachers, as they are sometimes called--is not confined to Florida, but officials at the Arlington, Va.-based NSTA say the approach is still not common.