Investigate the concept of symmetry at this test prep site. See detailed definitions and picture examples, answer the questions in the interactive practice pages, and do the classroom activity where students use a digital camera to...

This tutorial gives a very basic definition of lines.

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.

This tutorial features an explanation of endpoints.

This tutorial provides an explanation of line segments.

This website gives a very brief explanation and example of rays.

This very basic website gives a clear, simple explanation of what a right angle is.

This one page Mathworld site has a number of examples of semiregular tessellations. A definition and a small amount of related information is given at the bottom of the page.

This very basic website gives a clear, simple explanation of what an acute angle is.

This site gives the definition of acute triangles.

Understanding area and perimeter can help children work on solutions to very important, real world problems.

In this multi-day activity, 3rd graders make 3 different models of an orphanage floor plan using Google Drawing, Virtual Graph paper, and a construction of rectilinear shapes, to calculate the area of each room using units square.

Online drawing programs allow students to explore many possibilities with polygons!

Connect new measurement knowledge and skills to the students' immediate environment.

The children have been practicing decomposing areas and now digits in order to understand and use the distributive property.

Children need to move from the manipulative expressions of the distributive property into the mathematical equations eventually. This lesson is the first step in leading them to that goal.

Differences between shapes are determined through measurement skills.

This lesson is a real world task that combines many skills the students have learned throughout the school year.

Third graders will use the bat houses we built as examples of various quadrilaterals.

This one page website can expand your logic, Motion Geometry and pattern recognition knowledge. The solution is available to double check your answers.

Follow the directions at this one page website. You will get lots of practice plotting points on the coordinate grid and experience with transformational geometry.

What are square numbers? Use tiles at this one page website to discover the pattern of square numbers. See if you can solve the challenge. Once you have your solution you can check the solution given right at the website.

Remove four matches to the center of the square then repositions the other matches in such a way that the sum of them on each side is 11.

A math challenge where geometry, measurement, and problem solving meet. Explore the properties of three dimensional shapes when you discover how six friends can equally divide a nine inch square chocolate cake. A one page activity from...