Lesson Plan
Curated OER

Fraction Strips

For Teachers 4th - 5th
Get a handle on equivalent fractions through the use of manipulatives. Using area models, sets, and length manipulatives like fraction strips and Cuisenaire rods, the class will gain a deeper understanding of equivalent fractions....
Activity
Wolfram Research

Wolfram Math World: Polyhedron

For Students 9th - 10th Standards
This is a detailed site with numerous links related to polyhedrons, the site explains the term polyhedron in terms of geometry and algebraic topology it briefly discusses special polyhedrons which link to other Math World sites which...
Handout
National Council of Teachers of Mathematics

The Math Forum: Defining Geometric Figures

For Students 5th - 8th Standards
This site provides an in-depth definition of a two-dimensional figure and a three-dimensional figure. Related terms include arcs, vertices, polygon, and many more.