Özet:

In this study various definitions of critical thinking and the teaching approaches of critical thinking are represented In addition measurement instruments related to critical thinking skills are introduced Some measurement instruments are represented in terms of similarities and differences Watson Glaser Critical Thinking Appraisal is used frequently in Turkey is revised and Reliability values of Watson Glaser Critical Thinking Appraisal obtained from sample consisted of 9 grade students from low middle and high socio economic status in Adana Central Districts in 2002 2003 educational year is examined Key Words: Critical Thinking Definition of Critical Thinking Dimentions of Critical Thinking Teaching and Mesurement of Critical Thinking Watson Glaser Critical Thinking Appraisal

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