In Spanish. Gain your knowledge of tessellation with this interactive activity. Topics include identifying regular and semi-regular tessellations and figures that will tessellate. [Requires Java.]

[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on how to find the area of a square when given the perimeter. CCSS.Math.Content.3.MD.D.8 Solve real world and mathematical problems...

This applet allows for the exploration of the area of rectangles.

Brush up on your math skills relating to the area of parallelograms then try some practice problems to test your understanding.

[Free Registration/Login Required] This flipchart reviews segments, parallel and perpendicular lines and then introduces polygons including quadrilaterals. It has many real world examples of shapes and includes Activote assessment.

This one page website offers a challenge working with rectangles that can lead to a discussion of their properties. Teacher notes offer direction and a solution is offered at this website.

On this one page website sharpen your logic, spatial sense, and pattern recognition skills while working on this challenge. The solution is available to double check your solution.

Students can sharpen their logic and spatial relationship skills while working on this challenge on this one page website. The solution is available to double check your solution.

This site provides definitions of different types of polygons and figures.

Rectangle is SO MUCH like triangle! Those darned angles--they'll get beginning learners! This is a fun way to practice rectangle!

This website has basic definitions for most polygons, regular and irregular.

An illustration of two pyramids. A pyramid is a building where the upper surfaces are triangular and converge on one point. The base of pyramids are usually quadrilateral or trilateral (but generally may be of any polygon shape), meaning...

The challenge at this one page website, is to see how many trapezoids (British-trapeziums) you can find in the figure. When you have your results, you can easily check it right at the website.