Özet:

This research was studied with the purpose of analyzing the effect of Project Based Instructional Program (PBIP) on size/comparison and quantity concept development of 60-71 month children. The study in which an experimental pretest-posttest model with control group was used, 40 children who attended at kindergarten in 2011-2012 education year were included in the workgroup. Data gathered through general information form and The Bracken Basic Concept Scale, Third Edition: Receptive (BBCS-3:R) which was developed by Bracken (1984) and reviewed third time in 2006. The scale was used as a pretest to the children who were in experimental and control group of workgroup. PBIP was applied for half an hour in each day during eight weeks. After the program, BBCS-III: R form was applied as a posttest to groups and after four weeks it was applied as a followup test to the children in experimental group. When findings were analyzed, it is found that there is meaningful difference between scores of pretest-posttest of size/comparison and quantity concept of experimental group, this difference is in favor of scores of posttest. Comparing scores of posttest of sizes/comparison and quantity concept of experimental and control groups, it was found that there was a meaningful differentiation in favor of experimental group. When comparing posttest and follow-up test of size/comparison concept scores of experimental group, it was found that there was a meaningful differentiation in, which was stemmed from decreasing follow-up scores of children. When comparing posttest and follow-up test of quantity concept scores, it was proved that there was not a meaningful differentiation