Students locate transistor devices in school. They explain the importance of transistors.

Learners research the history of the transistor to explore the nature of technology. They complete a worksheet that coincides with given websites. Then they write a one-page essay about their findings.

Students use simple objects to create their own barometer. They have five days to build it and ten days to observe and collect data. They examine thunderstorm safety tips to end the instructional activity.

This is a one page presentation of the historical development of the audion tube. An image of DeForest's invention is included.

American inventor Lee De Forest was a pioneer of radio and motion pictures. He received more than 300 patents over the course of his lifetime, the most important of which was for a three-electrode vacuum tube, or triode, that he called...

An extensive site covering all aspects of Lee de Forest, his inventions, writings, and personal life. Find drawings and pictures of his audion tube and find out about his legacy, especially in the world of electronics.

This site provides a tour of the discovery and development of the transistor form PBS, including video and lesson plans.

Discusses the history of electronic banking, banking problems, vacuum tubes vs. transistors, magnetic ink character reading, handling paper at high speed, and the ERMA.

This website provides information on the life and inventions of Lee DeForest, the man who invented the audion tube, which made commercial radio broadcasting practical.

A biography on audion inventor, Lee de Forest, from childhood on. Hyperlinks to additional information about the radio and broadcasting.

Part of a larger site about the history of the transistor, this brief biography of Lee de Forest, the inventor of the audion, includes a QuickTime movie that shows how it worked.

A profile of Lee de Forest who lived from 1873 to 1961. He was one of the most important inventors of radio and electronic technology, whose inventions touch everyday life.

This Wikipedia encyclopedia article on Lee de Forest discusses his life and his invention of the triode (or audion), which laid the foundation for radio.