A couple of introductory Math games for Cicumference and using Geoboards to calculate Area and Perimeter

Geoboard perimeter exercise:  http://www.mathplayground.com/geoboard.html

To supplement this exercise, we did some work with "old school" Geoboards.  The challenges, and they went from easy to being a little more complex, are captured in some of the photos:

Reproducing work from the Geoboard onto the paper and then working on calculating the perimeter of the shape.

Most of the students were not aware that the formula for calculating the perimeter of a rectangle.  This is something we will use in this unit of Math.  It is: P = 2(l+w).

Here is a screenshot of a calculation we did as a class from the mathplayground game:

Using the formula to calculate the area

I did some scaffolding with the more complex portion of the work.  This involved creating different shapes with the same perimeter.

 Introductory review of the Circumference of a circle:  http://www.factmonster.com/math/knowledgebox/player.html?movie=sfw41551

To support this Grade 8 investigation, we were looking at the relationship between the circumference of a circle and the diameter of a circle.  Here are some photos of our investigations: