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GÜLBAĞCI DEDE, HANDE

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2017 - 201922020 - 20222
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    Proceedings of the Day Conferences June 2017
    (ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD, 2017) GÜLBAĞCI DEDE, HANDE; Nur, Melike Goksu; Akkoc, Hatice; Gulbagci-Dede, Hande; Yazici, Betul; Ankers, Sarah; Barichello, Leonardo; Guimaraes, Rita Santos; Black, Bryony; Brown, Julian; Burfitt, Joan; Cai, Hongyan; Zhang, Jian; Clarke, Kathryn; Clarke, Laura; Curtis, Fiona; Dimitriadi, Yota; Della Giusta, Marina; Razzu, Giovanni; Duah, Francis; Earle, Lorna; Rickard, Caroline; Ghergu, Marius; Griffiths, Barry J.; Helliwell, Tracy; Hewitt, Dave; Coles, Alf; Homer, Matt; Mathieson, Rachel; Banner, Indira; Tasara, Innocent; Ingram, Jenni; Andrews, Nick; Pitt, Andrea; Kuchemann, Dietmar; Lewis, Matt; Rauch, C. J.; De Asis, Marc; Leung, Alvin; Rostovtseva, Tatiana; Walker, Sharon; Rogers, Leo; Pope, Sue; Sharkey, Rachel; Sharma, Jai; Connor, Doreen; Stacey, Jenny; Trubridge, Nicola; Graham, Ted; Wang, Pei; Zhang, Jian
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    PublicationOpen Access
    Enhancing pre-service mathematics teachers' understanding of function ideas
    (2022-01-01) GÜLBAĞCI DEDE, HANDE; AKKOÇ, HATİCE; GÜLBAĞCI DEDE H., Yilmaz Z., AKKOÇ H., Tall D.
    Function is a multifaceted and essential concept in mathematics that includes various complex ideas such as mapping, relations between variables, algebra, input-output, and rule. Pre-service mathematics teachers\" (PMTs) should have a rich understanding of these ideas for their future teaching practices. However, research showed that PMTs had a limited and superficial understanding of function as students do. Thus, a learning module was designed for improving PMTs\" conceptualizations of function ideas as they relate to their personal concept definitions and examples of functions. A design-based research study was conducted with 17 senior PMTs. The study results suggest an improvement in the way PMTs define functions and identify a variety of function ideas in definitions and examples. Even if the mapping idea became dominant among all ideas in PMTs\" personal concept definitions and examples, they could identify the implicit function ideas and develop an understanding of connections between ideas. We also provide suggestions for the second cycle of the intervention.
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    PublicationOpen Access
    How to Introduce Function Concept in Textbooks?:_x000D_ Evaluations of Pre-Service Mathematics Teachers
    (2020-06-30) AKKOÇ, HATİCE; Zuhal YILMAZ;Hande GÜLBAĞCI DEDE;Hatice AKKOÇ
    Textbooks are one of the most commonly used instructional resources by teachers. Using textbookswithout critical evaluation has a direct impact on instruction. For this reason, it is important to examine how preservice teachers evaluate and criticize textbooks. The aim of this study is to examine how pre-service mathematicsteachers evaluate the introductory sections of three different mathematics textbooks on functions each of whichembraces a different function idea. In the study, pre-service teachers’ written evaluation reports on the introductorysections were examined. It was found that they could evaluate the introductory sections of the books with a criticallens along with providing mathematical and pedagogical justification. However, a significant weakness of preservice teachers’ mathematical justifications is the difficulty in supporting their ideas about the limitations andaffordances of function ideas. A major weakness in pedagogical justifications was that the examples of daily lifewere privileged regardless of to what extent they represented the mathematical meaning of function.
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    Proceedings of the Day Conference of the British Society for Research into Learning Mathematics (BSRLM) held at the University of Brighton, Brighton, Saturday 12th November 2016
    (ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD, 2017) GÜLBAĞCI DEDE, HANDE; Akkoc, Hatice; Bokhove, Christian; Redhead, Edward; Borthwick, Alison; Harcourt-Heath, Micky; Gulbagci-Dede, Hande; Akkoc, Hatice; Ingram, Jenni; Andrews, Nick; Kuchemann, Dietmar; Hodgen, Jeremy; Rogers, Leo; Pope, Sue; Sivadasan, Suja; Thouless, Helen; Mayorga, Pablo; Gifford, Sue