Özet:

– The purpose of this study was to determine the cognitive structures and to reveal the retention of knowledge occurring in a class of year 9 secondary school students after applying certain types of education. The study was conducted during the academic year of 2008-2010 with 48 students studying at a private high school located in the municipality of Istanbul using a Word Association Test (WAT). Two weeks after the having been taught a certain item and one year after teaching it the students were subjected to the WAT test. After completion of the test, a mind map was drawn from the results using the frequency tables prepared for the answers given by the students to the selected key concepts. Research results showed that the responses that the students gave shortly after the education involved more scientific expressions and the number of words used during the responses was higher , while their response rates showed a decrease both in number and frequency of use of scientific terminology used by the same students after one year

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