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Planinšic, Gorazd; Etkina, Eugenia – Physics Teacher, 2014
LEDs, or light-emitting diodes, are cheap, easy to purchase, and thus commonly used in physics instruction as indicators of electric current or as sources of light (Fig. 1). In our opinion LEDs represent a unique piece of equipment that can be used to collect experimental evidence, and construct and test new ideas in almost every unit of a general…
Descriptors: Science Instruction, Physics, Light, Energy
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Goodman, Robert; Etkina, Eugenia – Physics Teacher, 2008
For more than a hundred years there has been a debate about the sequence in which high school science should be taught. Many advocates of "Physics First" support a more conceptual ninth-grade physics course followed by chemistry and then biology while supporters of mathematically rigorous physics favor a sequence of biology-chemistry-physics. This…
Descriptors: Physics, Chemistry, Biology, Science Instruction