Tech Directions - February 2009 - (Page 5) contents February 2009 Vol. 68, No. 7 TECHNOLOGY EDUCATION Pinball Project Teaches 14 Score Big!Matthew K. Freeman Simple Machine Basics By This activity produces a working, entertaining product that keeps students interested while they simultaneously learn about many functions of simple machines. POWER AND ENERGY Topics! Heat 17 HotHarry T. Roman Pumps and Geothermal Energy By The recent rapid rises in the cost of energy has dramatically increased interest in alternative energy sources. The author discusses the underlying principles of heat pumps and geothermal energy and suggests related activities for technology education students. page 14 ELECTRONICS 19 Does It Work? 555-Timer Checker Leaves No Doubt By Charles Harman Procedures for the construction and use of a tester that allows students and instructors to easily check the operation of the industry standard 555-timer. CAREER DIRECTIONS Welding Ken Smith 22 EverythingTechnician Byto know about careers for welding students need technicians—wages, responsibilities, skills needed, career advancement possibilities, and more. SPECIAL FEATURE Development Opportunities 24 Professional provide educators and students with a great way Programs that to keep up with current technology, upgrade skills, and fulfill continuing education requirements. COLUMNS 4 Technically Speaking Susanne Peckham 11 Technology Today Alan Pierce 7 Direct from Washington Anne C. Lewis 12 Mastering Computers Reid Goldsborough 9 The News Report Susanne Peckham 10 Technology’s Past Dennis Karwatka 25 Product Central 28 Free for the Asking 30 More than Fun page 17 www.techdirections.com About the cover: An impressive example of the pinball machines constructed by Matt Freeman’s students in a project that teaches the basics of simple machines. Photo courtesy of Matthew K. Freeman. Cover design by Sharon K. Miller. CONTENTS 5 http://www.techdirections.com
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