The primary purpose of this booklet is to provide useful class and small group discussion tools for allowing students to inductively discover certain fundamental characteristics of language structure and to directly relate the study of sentence structure to the development of writing skills. A series of experiments is provided to serve as models for the development of informal learning activities in sentence structure. Accompanying teacher supplements for each experiment attempt to identify the grammatical concept involved, offer some explanation of this concept, identify possible difficulties some students might encounter, and offer suggestions for continued development and application when needed. The sentence-combining models provided are based on a generative-transformational grammar theory, but utilize such only as a framework and not as a detailed approach. (KS)