The document discusses interaction analysis, which is a process for encoding and decoding patterns of teaching and learning. It outlines three dimensions of interaction: communication, coordination, and integration. A typical system for interaction analysis includes categories, observation procedures, data tabulation steps, and application suggestions. Classroom interaction analysis is defined as recording verbal interactions during teaching sessions to capture qualitative and quantitative dimensions of teacher behavior. Flander's system is an observational tool that classifies verbal behaviors of teachers and students interacting in the classroom. The document also discusses encoding and decoding processes, rules for observers, and ways to interpret interaction analysis matrices.