The Effect of Student Centered Learning Model in Achievement of Biology Subject for Second Graders and Reasoning Thinking

This study was conducted in Baghdad targeted The Effect of Student Centered learning Model in Achievement of Biology Subject for Second graders average and Reasoning Thinking for the academic year 2015/2016. Sample was divided into two divisions randomly represent one of the experimental group (30students) studied of student Centered Learning and represented the second Division of Control group (30 students) I studied the usual way has group in chronological age in months and biogenic information and academic achievement former biology and scale scientific thinking. The researcher prepared achievement test consisted final from of (40) items were verified optional virtual honesty and sincerity content was difficult to the find the strength and modulus discrimination paragraphs and find stability reached (0-82) and the adoption of a measure research ready after confirmation of sincerity and persistence the results were a follows- 1. Out weigh the experimental group to their peers in the control group variable collection.2. Out weigh the experimental group to their peers in the control group variable Reasoning Thinking.