1. Australian Education Council (1991). A national statement on mathematics for Australian schools. Melbourne, Australia: Author.
2. Australian Curriculum, Assessment and Reporting Authority. (2011). The Australian curriculum. Sydney, Austalia: Author. Retrieved from http://www.australiancurriculum.edu.au/ . Accessed 27 May 2015.
3. Australian Curriculum, Assessment and Reporting Authority. (2012). Guide to understanding ICSEA. Sydney, Australia: Author. Retrieved from http://www.acara.edu.au/verve/_resources/Guide_to_understanding_ICSEA.pdf . Accessed 27 May 2015.
4. Bliese, P. (2012). Multilevel modelling in R (2.5). Columbia, SC: University of South Carolina. Available online at http://cran.r-project.org/doc/contrib/Bliese_Multilevel.pdf . Accessed 27 May 2015.
5. Bond, T. G. & Fox, C. M. (2007). Applying the Rasch model: Fundamental measurement in the human sciences (2nd ed.). Mahwah, NJ: Erlbaum.