Andrews, P. R. and Sayers, J. (2005) How do teachers of mathematics teach? A four-way international comparison. In: Barwell, R. and Noyes, A. (eds.) Research in Mathematics Education: Papers of The British Society for Research into Learning Mathematics. London: British Society for Research into Learning Mathematics. pp. 139-157.

Sayers, J. and Barber, P. (2012) It is quite confusing isn't it? In: Proceedings of POEM 2012. Centre for Educational Research in Mathematics and Technology (CERMAT).