Students review addition while playing this multi-player learning game. Student power their tug boats by answering the addition problems correctly. The speed of the tugboat is determined by how fast the learner answers the problem.

The involvement of Great Britain was an important part of the allied attempts to defeat the axis powers. This site provides a timeline of events in World War II, and gives a good general idea of Britain's role in the events of war.

Young students are introduced to the complex systems of the Earth through numerous lessons on its natural resources, processes, weather, climate and landforms. Key earth science topics include rocks, soils and minerals, water and natural...

Students learn about and experiment with the concept of surface tension. How can a paper clip "float" on top of water? How can a paper boat be powered by soap in water? How do water striders "walk" on top of water? Why do engineers care...

Awarded more than 100 patents over the course of his lifetime, Nikola Tesla was a man of considerable genius and vision. He was reportedly born at exactly midnight during an electrical storm, an intriguing beginning for a man who would...

A biography of John Ericsson, a man who invented in three countries over most of a century. He invented an early locomotive, a hot-air engine, screw propeller, and the Monitor, which was used in the Civil War. This is a transcript of an...

Kids learn about the Glossary and Terms of World War I. Definintions and words you need to know such as trench warfare, armistice, central powers, allies, reparations, and u-boat.

Peter the Great. This prince is one of the most extraordinary figures in history. As a boy he showed a great eagerness for knowledge in departments which were not generally attractive to the members of royal families. He cared nothing...