Fifth graders experience a lesson to investigate the methods for finding the area of a circle. They use the drawing of segments in order to visualize how a circle can be proposed of many parts. Then students brainstorm in order to derive...

Students examine the causes of tsunamis and observe a table top wave making machine. They make model houses while working in groups so that the can see how different construction types work. They discuss how engineers can design and...

Practice interesting area and circumference problems. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Here's a common sense site about what to do in case you are in the area of a tsunami. This site is very interesting in that it provides lots of pictures of the damage a tsunami can do. Lessons were learned after these particular tsunamis.