1. The Learning of Mathematics: 69th NCTM Yearbook [2007 NCTM Yearbook (69th)]. National Council of Teachers of Mathematics. 1906 Association Drive; Reston, VA 20191-1502., 2007. Accessed: May 06, 2016. [Online]. Available: http://search.proquest.com.proxy.library.adelaide.edu.au/eric/docview/61946697/6CD7C0FD1D44F9FPQ/2
2. E. Apino and H. Retnawati, "Developing instructional design to improve mathematical higher order thinking skills of students," in Journal of Physics: Conference Series, 2017, vol. 812, no. 1, p. 012100.
3. Collins, "Skills for the 21st Century: teaching higher-order thinking," Aug. 29, 2014. http://www.curriculum.edu.au/leader/teaching_higher_order_thinking,37431.html?issueID=12910 (accessed May 22, 2016).
4. B. E. Yagmur, "A Game-Based Activity Related to Prime Numbers," J. Inq. Based Act., vol. 10, no. 1, pp. 18– 30, 2020.
5. I. Ayuwanti, Marsigit, and D. Siswoyo, "Teacher-Student Interaction in Mathematics Learning," Int. J. Eval. Res. Educ., vol. 10, no. 2, pp. 660–667, Jun. 2021.