1. Alkan, V. (2011). One of the obstacles to effective mathematics teaching: Anxiety and its causes. Pamukkale University Journal of Education, 29(1), 89–107.
2. Al-Mahdi, O. (2010). A Qualitative investigation of home-school relationships and children’s mathematics learning in–and out-of-school in Bahrain. Procedia-Social and Behavioral Sciences, 8, 427–438.
3. Civil, M. (1998). Bridging in-school mathematics and out-of-school mathematics.
4. Creswell, J. W. (2012). Educational research: Planning, conducting, and evaluating quantitative and qualitative research. (4. Baskı) Boston: Pearson Education.
5. Creswell, J. W. (2013). Research design: Qualitative, quantitative, and mixed methods approaches. Thousand Oaks California, USA: Sage Publications.