Butt, Graham. 2015. MasterClass in Geography Education: Transforming Teaching and Learning (London: Bloomsbury Academic)
Hart, Kathleen. 1981. ‘Chapter 7, Ratio and Proportion’, in Children’s Understanding of Mathematics, 11-16 (London: John Murray), pp. 88–97 <https://contentstore.cla.co.uk/secure/link?id=8c863559-bf1d-e611-80bd-0cc47a6bddeb>
Jones, Mark. 2017. The Handbook of Secondary Geography (Sheffield: Geographical Association)
Lambert, David, and Mark Jones. 2013. Debates in Geography Education (London: Routledge)
