Posted by: degarcia | April 2, 2009

Big Ideas: Shapes and Solids

SHAPES & SOLIDS: Two- and three-dimensional objects with or without curved surfaces can
be described, classified, and analyzed by their attributes.
Examples of Mathematical Understandings:
• Point, line, line segment, and plane are the core attributes of space objects, and real-world situations can be used to
think about these attributes.
• Polygons can be described uniquely by their sides and angles.
• Polygons can be constructed from or decomposed into other polygons.
• Triangles and quadrilaterals can be described, categorized, and named based on the relative lengths of their sides and
the sizes of their angles.
• All polyhedra can be described completely by their faces, edges, and vertices.
• Some shapes or combinations of shapes can be put together without overlapping to completely cover the plane.
• There is more than one way to classify most shapes and solids.

Lesson Plans:

A site that has various math lesson plans including several on shapes and solids.

Teach about shapes through venn diagram and the world around you.

Find a lesson that is right for your class from these great selections of ideas.

Website Helps:

Manipulate different shapes to learn more about number of faces, edges, and vertices.

Practice visualizing 3D shapes through a simple game of hangman.

A site that covers all sorts fo different aspects of shapes and solids.

A site that talks about all the different shapes as well as a game to help visualize the shape.


Randall, C.I. (2005).Big ideas and understandings as the foundation for elementary and middle school mathematics. Journal of mathematics education leadership. 7,



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