Black, P. J. and ebrary, Inc. Assessment for Learning: Putting It into Practice. Maidenhead: Open University Press, 2003. Web. <http://site.ebrary.com/lib/aber/Doc?id=10161348>.
Brooks, Val, Ian Abbott, and Liz Bills. Preparing to Teach in Secondary Schools: A Student Teacher’s Guide to Professional Issues in Secondary Education. 2nd ed. Maidenhead: Open University Press, 2007. Print.
Geen, A. G. Addysgu Effeithiol Ar Gyfer Yr 21ain Ganrif: Blaenoriaethau Mewn Addysg Uwchradd. 4ydd argraffiad. Caerdydd: Gwasg UWIC, 2009. Print.
Goulding, Maria. Learning to Teach Mathematics. London: D. Fulton, 1997. Print.