Arithmetic Teaching Apparatus

Geometrical Models for Arithmetic Teaching

Standard topics in arithmetic teaching are calculations of the area of plane figures and the volume of solids. To make these processes clearer to students, educators introduced a variety of geometric models. Models were also used to teach about fractions and to explain the process of taking cube roots.

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Geometrical Models for Arithmetic Teaching

Holbrook's Geometrical Forms and Arithmetical Solids

Stereometry Made Easy, A Set of Geometric Models

Model of An Oblong or Rectangle, Ross Surface Form #3

Model of a Rectangle or Oblong, Ross Surface Form #2

Dissected Polygon, Probably a Ross Surface Form

Model of a Rectangle Bisected into Two Right Triangles, Ross Surface Form #8

Model of a Dissected Trapezoid, Ross Surface Form #6

Rectangle Transformable Into an Obtuse Triangle, Probably a Ross Surface Form

Dissected Rhomboid, Ross Surface Form #5 (incomplete)

Dissection of a Parallelogram into Triangles, Ross Surface Form #9

Dissection of a Parallelogram into Triangles, Ross Surface Form #10

Trapezium or Quadrilateral, Ross Surface Form

Dissected Square, Ross Surface Form #11

Regular Octagon, Ross Surface Form

Sixteen-Sided Regular Polygon, Ross Surface Form

Model Illustrating Finding the Area of a Circle, Ross Surface Form #14

Pyramid and Frustrum of Pyramid, Ross Solid #11

Square Prism, Ross Solid

Cylinder, Ross Solid #8

Dissected Triangular Prism, Ross Solid #9

Dissected Frustum of a Triangular Prism, Ross Solid

Cone Dissected into Two Pieces, Ross Solid #12

Model for the "Devil's Coffin" Diagram Relating to Computing the Volume of a Parallelepiped, Ross Solid

Dissected Circle Transformable into Parallelogram

Dissected Cylinder Transformable into Block

Dissected Cone

Dissected Sphere

Arithmetic of Practical Measurements to Accompany Kennedy's Improved Dissecting Mathematical Blocks

Archimedes, the Divisible Apple