This Digest focuses on the method of teaching foreign languages in Kindergarten through Grade 8 using content-based instruction. In this approach, the foreign language is used as the medium for teaching subject content, such as mathematics or social studies. In content-based instruction, students become proficient in the language because the focus is on the exchange of important messages, and language use is purposeful. The Digest discusses ways of planning for content-based or thematic teaching, where the curriculum is organized around a thematic center. Activities that teach language concepts along with the content are interrelated and are planned to fit within the framework of a lesson or thematic unit. Three examples of planning for thematic or content-based teaching are provided, including a semantic map or web based on the solar system, a chart for planning a unit on Puerto Rico based on Gardner's Multiple Intelligences, and a chart for planning a content-based unit on architecture using the Unit Plan Inventory. Other helpful suggestions for planning lessons that integrate language and content instruction are provided. Contains five references. (JL)