Geometry
From the story of how geometry got its name to the study of lines, angles, polygons, and area -- abstract mathematical thinking grounded in sensorial exploration.
Introduction to Geometry
The story of how geometry got its name and an overview of geometry in the elementary classroom.
Geometry Nomenclature & Activities
Nomenclature, command cards, design work, constructions, and the geometry portfolio.
Geometric Solids
Names, parts, polyhedrons, solids of rotation -- three-dimensional forms explored through the hands.
Congruence, Similarity, Equivalence
The three fundamental geometric relationships explored with divided figures and constructive triangles.
Lines
Types, positions, parallel and non-parallel, intersecting, and perpendicular bisectors.
Angles
Types, parts, measurement, bisecting, and relationships between angles formed by intersecting lines and transversals.
Polygons
Naming, parts, interior angles, diagonals, regular polygons, triangles, and quadrilaterals.