The document discusses techniques and materials for language lessons. It identifies a variety of techniques that can be used, from controlled manipulative techniques to free communicative techniques. It also discusses how to evaluate and adapt textbooks and other materials to meet lesson objectives. Key factors for evaluating materials include checking their alignment with course goals, students' backgrounds, approaches, language skills, content, quality, sequencing, vocabulary, and social/linguistic factors. The document emphasizes adapting existing materials where possible rather than creating everything new.