1. Annelise Carleton-Huga, J. William Hugb (2010). Challenges and opportunities for evaluating environmental education programs. Evaluation and Program Planning, 33(2), 159-164. https://doi.org/10.1016/j.evalprogplan.2009.07.005
2. Aksu, M. (1991). A study on the effectiveness of different teaching methods and mathematicsachievement levels on achievement, retention, and attitude toward mathematics and selected topics. Educational Research and Evaluation, 7(1), 1-18.
3. Al-Habbash, A.Y. (2014). Obstacles to learning mathematics and a proposal to overcome them for eleventh-grade students. A magister message that is not published. The Islamic University of Gaza.
4. Al-Agaili, L. (2023). Obstacles to teaching and learning mathematics scheduled for the intermediate stage from the point of view of teachers and students in Iraq. Texas Journal of Multidisciplinary Studies, 24, pp.64–72.
5. Alwan, A. (2004). Education in Iraq: Current Situation and New Perspectives. A report on the situation today and our strategies for the immediate future. Ministry of Education