The aim of the study was to investigate how well the geometry achievement is explained by field dependency/ independency cognitive styles, spatial orientation, spatial visualization and attitude toward geometry. The sample of the study was composed of 378 ninth grade students (183 male and 195 female) from five different lycees in EskiSehir. The types of schools participating in the study were General High School, Anatolian High School, Commercial Vocational High, and Anatolian Fine Art High School. The data were collected by using four instruments, which were Group Embedded Figure Test ( GEFT ) , Spatial Ability Tests, Geometry Achievement Test (GAT) and Geometry Attitude Scale (GAS). GEFT developed by Witkin, Oltman, Raskin and Karp ( 1971 ) was used to determine students&rsquo / cognitive styles. Another test, The Spatial Ability Test developed by Ekstrom and colleagues (1976) was composed of four sub-tests. Two of them were aimed to measure spatial orientation, which were Cube Comparison and Card Rotation test. The others were developed to measure spatial visualization, which were Paper Folding and Surface Development tests. The Turkish version of the tests translated by Delialioglu (1996) used in the study. In order to measure geometry achievement, GAT was developed by researcher. GAS developed by Bulut, iSeri, Ekici and Helvaci (2002) was used to measure the dimension of like/dislike geometry, usefulness of geometry and anxiety about geometry. The data conducted from the research sample through the tests and scale was analyzed by using regression analysis. The multiple regression analysis indicated that students&rsquo / cognitive styles were the most significant variable in explaining their geometry achievements. The other predictive variables also made statistically significant contribution in explaining the variance in geometry achievement. Four predictive variables of the study were entered the regression model, and explained the % 47 of the variance in geometry achievement. The findings of the study suggested that students&rsquo / field dependency/ independency cognitive style had high importance in learning geometry / and it should have taken into the consideration in teaching geometry.

The purpose of this study is to determine the impact on student achievement of elementary school teachers who participated in professional development in the content area of mathematics. Teachers participated in professional development courses and have accumulated a range from three to eighteen total credits from the summers of 1998 through 2007. The impact is measured by student achievement data collected on standardized tests.

The main purpose of this study was to assess the relationship between students' achievement in mathematics and teachers' background, professional development and teaching practices. A self report instrument - Mathematics Teaching Opinionate Scale (MaTOS) was used to collect data from Form C (Grade 10) mathematics teachers in the Maseru District in Lesotho, Southern Africa. Stratified random sampling technique was adopted for the study in the selection of participants screened on the basis of type of ownership of schools. The simple random format was subsequently utilized to pick 40 teachers on the basis of school population. Out of the total participants of 40 teachers, 18 (45.0%) were males while 22(55.0%) were female. Simple correlation and regression statistics at the 0.01 and 0.05 significance levels were utilized for data analysis. Findings indicated a significant positive relationship between students' academic achievement in mathematics and teachers' background (i.e. teachers' qualifications, subject majors and years of experience especially from six years of teaching) with r = 0.552, P < 0.01. Furthermore, regression analysis showed that teachers' qualifications (&#946; = 0.77, P < 0.05), subject majors (&#946; = 0.35, P < 0.05) and experience (&#946; = 0.16, P < 0.05) were predictors of students' achievement in mathematics [F(3,39) = 4.321; P < 0.05)]. The findings therefore suggest that if all mathematics teachers have a degree, are specialized in mathematics or mathematics education and have more than five years teaching experience the students' achievement in mathematics would likely improve. / MATH, SCIENCE & TECH EDU / MSC (MATHS,SCIENCE OR T/EDU)

The main purpose of this study was to assess the relationship between students' achievement in mathematics and teachers' background, professional development and teaching practices. A self report instrument - Mathematics Teaching Opinionate Scale (MaTOS) was used to collect data from Form C (Grade 10) mathematics teachers in the Maseru District in Lesotho, Southern Africa. Stratified random sampling technique was adopted for the study in the selection of participants screened on the basis of type of ownership of schools. The simple random format was subsequently utilized to pick 40 teachers on the basis of school population. Out of the total participants of 40 teachers, 18 (45.0%) were males while 22(55.0%) were female. Simple correlation and regression statistics at the 0.01 and 0.05 significance levels were utilized for data analysis. Findings indicated a significant positive relationship between students' academic achievement in mathematics and teachers' background (i.e. teachers' qualifications, subject majors and years of experience especially from six years of teaching) with r = 0.552, P < 0.01. Furthermore, regression analysis showed that teachers' qualifications (&#946; = 0.77, P < 0.05), subject majors (&#946; = 0.35, P < 0.05) and experience (&#946; = 0.16, P < 0.05) were predictors of students' achievement in mathematics [F(3,39) = 4.321; P < 0.05)]. The findings therefore suggest that if all mathematics teachers have a degree, are specialized in mathematics or mathematics education and have more than five years teaching experience the students' achievement in mathematics would likely improve. / MATH, SCIENCE and TECH EDU / MSC (MATHS,SCIENCE OR T/EDU)

The purpose of this study is to determine the impact on student achievement of elementary school teachers who participated in professional development in the content area of mathematics. Teachers participated in professional development courses and have accumulated a range from three to eighteen total credits from the summers of 1998 through 2007. The impact is measured by student achievement data collected on standardized tests.