Mr. X will teach a geography lesson on fluvial processes and drainage patterns to a class of 32 Grade 12 students in South Africa. The lesson will introduce terminology like interfluve and aquifer, explain how rock types influence drainage patterns, and have students identify landforms and drainage patterns on a map. Through activities like pictionary and a lecture, students will learn to differentiate drainage patterns, understand how landforms determine patterns, and appreciate how landforms influence water supply. The lesson aims to help students apply their map skills and understand the connections between fluvial processes and landform geomorphology.