Interest in foreign-language instruction in preschool is growing, both among parents and early-childhood educators trying to meet the demand. The interest, though, comes at a time when some districts are scaling back on such programs in the elementary grades in order to spend more time on reading and mathematics--the subjects currently tested to comply with the federal No Child Left Behind Act. Immersion programs, where children hear only the second language while they are in the classroom, is one model of instruction that has been growing at the preschool level, and some experts say that this is the most effective way for young children to learn another language. It has been shown that learning a second language enhances native-language skills, enhances creativity and problem-solving, and allows increased exposure to other cultures and traditions.