This free course was written by Christothea Herodotou. It was first published in June 2020.
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Course image: © Adene Sanchez/iStock
Figure 1: © Artur Debat/Contributor/Getty
Figure 2: © Tim Clayton - Corbis/Contributor/Getty
Figure 3: NAGT. This file is licensed under the Creative Commons Attribution-ShareAlike 3.0 Generic License. https://creativecommons.org/licenses/by-nc-sa/3.0/
Figure 4: source: https://educationendowmentfoundation.org.uk/projects-and-evaluation/projects/
Figure 5: © Maskot/Getty
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Figure 7: © Sally Anscombe/Getty
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