This document provides lessons on expressing opinions through agreement and disagreement. It begins by stating the goals of expressing opinions in various situations both orally and in writing. It then discusses why knowing how to agree or disagree is important for making choices and persuading others. The document provides expressions to signal agreement or disagreement and advice on speaking with confidence and stating reasons. It gives examples of initiating opinions on topics like the death penalty and television's role in society. Finally, it discusses agreeing, half-agreeing, and disagreeing with opinions and using grammar structures like "so do I" to agree and "neither do I" to disagree.