Geometry is the network of concepts, ways of reasoning and representation systems used to explore and analyse shape and space. A rich and clear understanding of geometry is essential to prepare learners to be mathematically literate citizens in the 21st century. In this module, teachers will design lesson plans that foster learners’ understanding of parallel and perpendicular lines, triangles, squares and rectangles. By focusing on definition and exemplification, this module will equip teachers with the tools to design impactful lesson plans to introduce geometry.