Geometry is taught to establish a solid foundation in mathematics and spatial reasoning, promoting a comprehensive understanding of shapes, spatial relationships, and mathematical concepts. This is a large selection of 3-part cards and books that are found in lower and upper elementary Montessori classrooms (ages 6-12 years). To use the three-part cards, match the labels to the corresponding pictures. Verify the matches using the control cards with the labels. This bundle includes 16 sets elementary geometry materials. Fundamental Concepts of Geometry - cards & book Types of Polygons - cards & book Types of Quadrilaterals - cards & book Types of Triangles - cards & book Study of a Circle - cards & book Study of a Parallelogram - cards & book Study of a Polygon - cards & book Study of a Quadrilateral - cards & book Study of a Rectangle - cards & book Study of a Rhombus - cards & book Study of a Square - cards & book Study of a Trapezoid - cards & book Study of a Triangle - cards & book Study of Angles - cards & book Study of Lines - cards & book Three Dimensional Shapes: Cut & Fold To view the contents of each material, please visit our elementary geometry section. Cards with labels are approx. 3½" x 3¼", cards without labels are approx. 1" shorter, labels are approx. 1". There are two book styles included: style one is approximately 3¾" x 5", and style two is approximately 5½” x 5½“. The second style requires minimal preparation. The files are in PDF format. The download is a ZIP file you must unzip before accessing the individual PDFs.