Activity
Rice University

Rice University: Cynthia Lanius: No Matter What Shape Your Fractions Are In

For Teachers K - 1st Standards
Four basic geometric shapes - the triangle, parallelogram, trapezoid, and hexagon - are examined to determine how many of one shape fits "inside" another. For instance, how many triangles are "in" a hexagon. Ten questions with solutions...
Activity
University of Cambridge

University of Cambridge: Nrich: Where Are They?

For Students 3rd - 8th
Test your logic, polygon properties, and pattern recognition skills working on this challenge. Solution included.
Activity
Houghton Mifflin Harcourt

Houghton Mifflin Harcourt: Saxon Activity Center Real World Investigation: The Geometry of Quilts [Pdf]

For Students 3rd - 8th
Investigating designs and shapes in quilts around the world is the activity in this internet exploration. Learners will also design their own quilt on paper or on the computer. Acrobat Reader required.
Activity
University of Cambridge

University of Cambridge: Nrich: Making Boxes

For Students 3rd - 8th Standards
Have fun and learn by making a box and then find out its maximum volume as well as other problem-solving activities, including making a table of your results and drawing a graph.