This article presents a rationale for correlation of science with language instruction, whether English as a second language (ESL) or first language development. Science can provide a conceptual base for vocabulary and syntactic development. Numerous studies indicate that language ability can be significantly increased through participation in activity science programs. Units can be developed around students' previous experiences building upon their present knowledge and developing self-esteem. Focusing on behavioral objectives will help in planning science activities. Group work which will encourage student discussion and cooperation toward a goal should be planned. Suggested topics for units or learning centers include "Foods of Ancient America,""Mother's Medicines," and "Clay Like the Indians Used." (Author/EJS)