References
- Cockburn, A. D. (2013). Headteachers, mediocre colleagues and the challenges of educational leadership. Basingstoke: Palgrave Macmillan.
- McGarrigle, J., & Donaldson, M. (1974). Conservation accidents. Cognition, 3, 341–350. doi: 10.1016/0010-0277(74)90003-1
- Piaget, J. (1952). The child's conception of number. London: Routledge and Kegan Paul.
- Rosenthal, R., & Jacobson, L. (1968). Pygmalion in the classroom. New York: Holt, Rinehart and Winston.