Guide students to discover the concepts on their own! Little instruction required. Students do the work. Leads to retention, not repetition. Included are lessons on Geometry Basics, Logic and Proof, Parallel and Perpendicular Lines, Transformations, Triangles and Congruence, Quadrilaterals and Other Polygons, Understanding Similarity and Proportionality, Right Triangles and Trigonometry, Circles, Circumference, Area, and Volume. Also includes student-made reference sheets, some exit tickets, and