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    Developing a belief scale according to using computer technology in mathematics teaching
    (Elsevier Science Bv, 2014) Yilmaz, Gul Kaleli
    This study's aim is to develop a valid and reliable evaluation instrument to define the believes according to using technology in mathematical teaching. The sample is formed with 216 candidate teachers. While forming a scale those steps are followed having item tool, taking expert opinion, implementation, computing validity and reliability, finalizing the scale. At the end of the analysis scale is formed with 31 items, four factors and four factors' variance ratios are %44. Cronbach Alpha internal integrity coefficient is calculated as 0.895 for the whole scale. In line with findings the belief scale according to using computer technology in mathematics teaching is improved and it is decided as a valid and reliable evaluation instrument. (C) 2014 The Authors. Published by Elsevier Ltd.
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    DEVELOPING AN ATTITUDE SCALE TOWARDS USING INSTRUCTIONAL TECHNOLOGIES FOR PRE-SERVICE TEACHERS
    (Turkish Online Journal Educational Tech-Tojet, 2012) Metin, Mustafa; Yilmaz, Gul Kaleli; Coskun, Kerem; Birisci, Salih
    The aim of this study is to develop an attitude scale towards using instructional technologies (USIT) for pre-service teachers. The research was carried out with 1235 pre-service teachers that 567(45.9%) were freshman; 401 (32.5%) were sophomore; 151 (12.2%) were junior and 116 (9.4%) were senior students at different universities in Turkey. The study consists of five parts including literature review, item pool, experts' opinions, administration of scale and computing the reliability and validity. While constituting the item pool, an interview was carried out with 15 pre-service teachers related to instructional technologies. Among from 55 items which are directly related with the subject of attitude or which are selected from the relevant interviews. 45 of them were edited by expert opinions the five point likert type. The draft scale was administered to 1235 pre-service teachers. As a result of factor analysis, the number of items was reduced to 37. After carring out factor analysis the Cronbach-Alpha internal integrity coefficient of the final version of the scale was found as 0.949. By computing the reliability of USIT, the scale was ready to be used.
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    The Effect of Dynamic Geometry Software and Physical Manipulatives on Candidate Teachers' Transformational Geometry Success
    (Edam, 2015) Yilmaz, Gul Kaleli
    This study aims to investigate the effects of using Dynamic Geometry Software (DGS) Cabri II Plus and physical manipulatives on the transformational geometry achievement of candidate teachers. In this study, the semiexperimental method was used, consisting of two experimental and one control groups. The samples of this study were 117 students. A 30-question test which was prepared based on the relative literature and expert opinion was used as a data collection tool. The test includes sections on recognition, features, and construction, and each section consists of ten questions. The data obtained from the pre- and post-tests were analyzed using the SPSS program. As a result of the statistical analysis, success levels of all groups were found to be the same before the applications, but after the applications, students' transformational geometry success was found to significantly increase. When group success was analyzed, it was seen that the Computer Group placed first, the Manipulatives Group placed second, and the Traditional Group placed third in the sections of recognition and features. In the construction section, the Computer and Manipulatives Groups' success levels were equal, and both groups were significantly more successful than the Traditional Group. The exercises performed with all groups increased their success levels significantly, thus showing that the applications were effective.