Scientists inserted daffodil genes and other genetic material into ordinary rice to make this golden rice. The result is a strain of rice that provides vitamin A, a nutrient missing from the diets of many people who depend on rice as a...

This military history essay describes the landing of the United States Army during the Normandy Invasion of June 6, 1944.

A full and complete discussion of the simple machine called the screw, a modified inclined plane. Many examples and drawings and applications.

A full and complete discussion of the simple machine called the screw, a modified inclined plane. Many examples and drawings and applications.

Due to similarities with both the bear and raccoon family, the classification of the red panda (Ailurus fulgens) has caused continued controversy since it was first described in 1825. Today it is placed with the raccoons, but in its own...

A map from 1898 showing the heat belts in North America. The map gives the boundary isotherms of the hot belt as a mean temperature of 70 degrees Fahrenheit and the cold belt as a mean temperature of 30 degrees Fahrenheit, indicating the...

This is a site for getting students looking at their world - and teaching optics at the same time. Students build a modified kaleidoscope that will provide 3-dimensional images. Fun site.

This is a site for getting students looking at their world - and teaching optics at the same time. Students build a modified kaleidoscope that will provide 3-dimensional images. Fun site.

A great lesson plan in an unusual art technique. The idea is to color puzzle pieces separately and then reconstruct the puzzle for a finished work of art. Some experimentation may be needed, but the idea is great and can be modified for...

A great lesson plan in an unusual art technique. The idea is to color puzzle pieces separately and then reconstruct the puzzle for a finished work of art. Some experimentation may be needed, but the idea is great and can be modified for...

Nine superior quality Powerpoint game templates are available for free downloading. Instruction for playing and modifying each game are included. Games for both individual student use and whole class review are included.

Nine superior quality Powerpoint game templates are available for free downloading. Instruction for playing and modifying each game are included. Games for both individual student use and whole class review are included.

Nine superior quality Powerpoint game templates are available for free downloading. Instruction for playing and modifying each game are included. Games for both individual student use and whole class review are included.

Nine superior quality Powerpoint game templates are available for free downloading. Instruction for playing and modifying each game are included. Games for both individual student use and whole class review are included.

Nine superior quality Powerpoint game templates are available for free downloading. Instruction for playing and modifying each game are included. Games for both individual student use and whole class review are included.

Nine superior quality Powerpoint game templates are available for free downloading. Instruction for playing and modifying each game are included. Games for both individual student use and whole class review are included.

Nine superior quality Powerpoint game templates are available for free downloading. Instruction for playing and modifying each game are included. Games for both individual student use and whole class review are included.

The spade was but little used in ancient husbandry, the ground having been broken and turned over by the plough, and also by the use of large hoes and rakes. The preceding woodcut, taken a deceased countryman with his falx and bidens,...

John Jewel (May 24, 1522 - September 23, 1571), was an English bishop of Salisbury. Under Elizabeth's succession he returned to England, and made earnest efforts to secure what would now be called a low-church settlement of religion; he...

The Awash valley contains one of the most important groupings of palaeontological sites on the African continent. The remains found at the site, the oldest of which date back at least 4 million years, provide evidence of human evolution...