1. Askew, M., Brown, M., Rhodes, V., Wiliam, D., & Johnson, D. (1997). Effective teachers of numeracy: Report of a study carried out for the Teacher Training Agency. London: King’s College, University of London.
2. Askew, M., Hodgen, J., Hossain, S., & Bretscher, N. (2010). Values and variables: Mathematics education in high-performing countries. London: Nuffield Foundation.
3. Association of Teachers of Mathematics [ATM]. (2004). Number without a worksheet for reception and year 1. Derby: Association of Teachers of Mathematics.
4. Association of Teachers of Mathematics [ATM]. (2006). Shape and space without a worksheet for reception and year 1. Derby: Association of Teachers of Mathematics.
5. Association of Teachers of Mathematics [ATM]. (2015). Minutes of 31st Annual General Meeting, 31 March 2015, Staverton Park, Daventry. Derby: Association of Teachers of Mathematics Retrieved from
https://www.atm.org.uk/write/MediaUploads/Governance/Annual%20Reports/Combined_Final_2015.pdf
.