What is a chemical?
We take it for granted that those who teach chemistry know what chemicals are but this is not always the case
Sara Salloum from Long Island University US and Saouma BouJaoude from the American University in Beirut investigated science teachers' ideas about chemicals.1 They interviewed 43 experienced teachers who had all studied science subjects as part of their degrees and had all taught chemistry. The interviews were designed to check on the teachers' depth of understating of the concept of chemicals.
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