@article{2013,title={INVESTIGATION OF PRESERVICE MATHEMATICS TEACHERS’ PROOF SCHEMES ACCORDING TO DNR BASED INSTRUCTION},abstractNode={The aim of this study is to determine the types of the proof schemes used in the proof process by freshman and senior elementary pre-service mathematics teachers who are students at public university in 2011-2012 academic year and also to examine whether there is any difference between proof schemes used by freshman and senior elementary pre-service mathematics teachers. The sample of the study consists of 135 elementary pre-service mathematics teachers. Because the actual state is investigated descriptive method is used. 5 problems are asked and answers are classified according to proof schemes. Classification designed by Harel and Sowder (1998) is used. In the analysis process, answers of elementary pre-service mathematics teachers are evaluated according to proof schemes’ properties and classified into 4 categories; external, empirical, analytical, and empty. Percentage frequency tables of proof schemes prepared and bar chart is drawn. Also, it is analyzed that whether there is a significant difference between proof schemes according to class levels or not by using t test with a statistical programme. Results indicated that all proof scheme types (external, analytical, empirical) are used by the students. Also, empirical schemes are mostly used by freshman elementary pre-service mathematics teachers and analytical schemes are mostly used by senior elementary pre-service mathematics teachers. Suggestions made according to results of the study. },author={Sare ŞENGÜL-- Pınar GÜNER},year={2013},journal={The Journal of Academic Social Science Studies}}