D. L. Ball, H. C. Hill, and H. Bass, Knowing mathematics for teaching: Who knows mathematics well enough to teach third grade, and how can we decide? American Educator, pp.14-17, 2005.

R. Barkai, P. Tsamir, D. Tirosh, and T. Dreyfus, Proving or refuting arithmetic claims: The case of elementary school teachers, Proceedings of the 26 th Annual Meeting of the International Group for the Psychology of Mathematics Education, pp.57-64, 2002.

O. Buchbinder and O. Zaslavsky, Is this a coincidence? The role of examples in fostering a need for proof. Special issue on 'Examples in Mathematical Thinking and Learning from an Educational Perspective, ZDM - The International Journal on Mathematics Education, pp.269-281, 2011.

G. Harel, The DNR system as a conceptual framework for curriculum development and instruction, Foundations for the future in mathematics education, pp.263-280, 2007.

N. Hadas, R. Hershkowitz, and B. B. Schwarz, The role of contradiction and uncertainty in promoting the need to prove in dynamic geometry environments, Educational Studies in Mathematics, vol.44, issue.1/2, pp.127-150, 2000.
DOI : 10.1023/A:1012781005718

E. Knuth, Secondary School Mathematics Teachers' Conceptions of Proof, Journal for Research in Mathematics Education, vol.33, issue.5, pp.379-405, 2002.
DOI : 10.2307/4149959

Y. Y. Ko, MATHEMATICS TEACHERS??? CONCEPTIONS OF PROOF: IMPLICATIONS FOR EDUCATIONAL RESEARCH, International Journal of Science and Mathematics Education, vol.39, issue.1, pp.1109-1129, 2010.
DOI : 10.1007/s10763-010-9235-2

W. G. Martin and G. Harel, Proof Frames of Preservice Elementary Teachers, Journal for Research in Mathematics Education, vol.20, issue.1, pp.41-51, 1989.
DOI : 10.2307/749097

A. Strauss, Qualitative analysis for social scientists, 1987.
DOI : 10.1017/CBO9780511557842

A. J. Stylianides and D. L. Ball, Understanding and describing mathematical knowledge for teaching: knowledge about proof for engaging students in the activity of proving, Journal of Mathematics Teacher Education, vol.36, issue.1, pp.307-332, 2008.
DOI : 10.1007/s10857-008-9077-9

A. J. Stylianides and G. J. Stylianides, Proof constructions and evaluations, Educational Studies in Mathematics, vol.68, issue.1, pp.237-253, 2009.
DOI : 10.1007/s10649-009-9191-3

O. Zaslavsky, Seizing the Opportunity to Create Uncertainty in Learning Mathematics, Educational Studies in Mathematics, vol.49, issue.1, pp.297-321, 2005.
DOI : 10.1007/s10649-005-0606-5

O. Zaslavsky and P. Sullivan, Constructing Knowledge for Teaching Secondary Mathematics, 2011.
DOI : 10.1007/978-0-387-09812-8

R. Zazkis, Challenging basic assumptions: mathematical experiences for pre-service teachers, International Journal of Mathematical Education in Science and Technology, vol.1, issue.5, pp.631-650, 1999.
DOI : 10.1007/BF01278921