1. Department for Education (2015), available at: www.gov.uk/government/publications/national-curriculum-in-england-mathematicsprogrammes-of-study/national-curriculum-in-england-mathematics-programmes-ofstudy#key-stage-4 (accessed 20 August 2015).
2. James, M. (2011), “An alternative to the objectives model: the process model for the design and development of curriculum”, in Elliott, J. and Norris, N. (Eds), Curriculum, Pedagogy and Educational Research: The Work of Lawrence Stenhouse, Routledge, London and New York, NY.
3. Lewis, C., Perry, R. and Friedkin, S. (2009), “Lesson study as action research”, in Noffke, S.E. and Somekh, B. (Eds), The SAGE Handbook of Education Action Research, Sage Publications, London and Thousand Oaks, CA and New Delhi.