Khan Academy - Math, Science & Humanities Video Tutorials & Exercises
Over 1,800 10 minute online tutorials in all aspects of math from arithmetic through algebra, geometry, trigonometry, calculus and advanced linear algebra to statistics, finance, biology, chemistry, physics, and test preparation.
Measuring a Circle - A Math Lesson for Grades 5-10
This article promotes teaching methods that engage students in active learning that results in deep conceptual understanding of how to measure the circumference and area of a circle.
The Stowaway Adventure
Grade 6-Grade 12
Use real-time data from the internet to track ships at sea, determine their destination, and predict when they will arrive. A very interesting activity which offers opportunity to learn some world geography, practice the scientific method, and apply math skills...