Yusuf Koç - Academia.edu (original) (raw)

Papers by Yusuf Koç

06.03.2018 tarihli ve 30352 sayılı Resmi Gazetede yayımlanan “Yükseköğretim Kanunu İle Bazı Kanun... more 06.03.2018 tarihli ve 30352 sayılı Resmi Gazetede yayımlanan “Yükseköğretim Kanunu İle Bazı Kanun Ve Kanun Hükmünde Kararnamelerde Değişiklik Yapılması Hakkında Kanun” ile 18.06.2018 tarihli “Lisansüstü Tezlerin Elektronik Ortamda Toplanması, Düzenlenmesi ve Erişime Açılmasına İlişkin Yönerge” gereğince tam metin erişime açılmıştır.Bu çalışmada, hem katkı maddesi hem de bitki büyüme düzenleyici olarak seçilen farklı konsantrasyonlardaki potasyum humat, bor humat ve demir humat'ın kolzanın fizyolojik özellikleri, sürgün rejenerasyonu ve antioksidant enzim aktiviteleri üzerine etkisi araştırılmıştır. Steril edilen tohumlar % 3 (w/v) sükroz ve % 0.7 (w/v) agar ile her biri 1 ppm, 3 ppm, 5 ppm and 7 ppm konsantrasyonlarında olan potasyum humat, bor humat ve demir humat içeren Murashige and Skoog temel besiyerinde kültüre alınmıştır. Fizyolojik özellikler ve antioksidant enzim aktiviteleri bir haftalık bitkicikler üzerinde gözlenmiştir. 3-4 haftalık bitkiciklerden alınan gövde ekspla...

Deger, bir seye onem kazandiran olgudur. Deger, insanin duygu, dusunce ve davranislari ile ilgili... more Deger, bir seye onem kazandiran olgudur. Deger, insanin duygu, dusunce ve davranislari ile ilgilidir. Bir toplum, bir inanc, bir ideoloji icinde veya insanlar arasinda kabul edilmis, benimsenmis ve yasatilmakta olan toplumsal, insani, ideolojik veya ilâhi kaynakli her turlu duyus, dusunus, kural ya da kiymetlerdir degerler. Degerler egitimi de ayni zamanda bir karakter egitimidir. Yani degerler egitimi ile amaclanan sey saglam karakterli nesiller yetistirmektir. Turk egitim sistemi de bunu kazandirmak istemektedir. Turk Milli Egitim Temel Kanunu’nun genel amacinda “…milli, ahlâki, insani, manevi ve kulturel degerlerini benimseyen, koruyan ve gelistiren; ailesini, vatanini, milletini seven ve daima yuceltmeye calisan…” seklinde ifade edilmistir.

The purpose of this study is to examine the effect of department and years spent in program on el... more The purpose of this study is to examine the effect of department and years spent in program on elementary and secondary mathematics pre-service teachers’ mathematics teaching efficacy beliefs. The study was conducted with 318 pre-service teachers enrolled in elementary and secondary mathematics teacher education programs in the United States. The Mathematics Teaching Efficacy Belief Instrument (MTEBI, Enochs, Smith, & Huinker, 2000) was used to measure the participants’ teaching efficacy beliefs. The results show that there was significant effect of department and years spent in the department on pre-service teachers’ personal mathematics teaching efficacy scores. No significant effect of the department and years spent in the department of mathematics teaching outcome expectancy scores was observed. The results were discussed and teaching ideas for teacher educators were suggested.

The purpose of this qualitative case study was to examine what prospective mathematics teachers n... more The purpose of this qualitative case study was to examine what prospective mathematics teachers noticed with respect to the student roles underlined in the elementary mathematics program when video-case based pedagogy was employed in teacher education. The theoretical framework employed in this study was Learning to Notice framework developed by van Es and Sherin (2002). The data was collected through reflection papers and interviews from 15 senior prospective teachers enrolled at a large state university. The findings indicated that prospective teachers could notice several issues related to student roles underlined in the elementary mathematics program when they were provided with a learning environment to analyze real mathematics classrooms.

Kastamonu Eğitim Dergisi, 2019

Bu çalışmada ortaokul matematik öğretmen adaylarının açı kavramını tanımlama ve şeklini çizmeye d... more Bu çalışmada ortaokul matematik öğretmen adaylarının açı kavramını tanımlama ve şeklini çizmeye dair bilgileri incelenmiştir. Bu amaçla Türkiye’nin güneyindeki bir üniversitenin ilköğretim matematik öğretmenliği bölümü bahar döneminde geometri dersi alan toplam 151 katılımcıdan veri toplanmıştır. Veri toplama sürecinde katılımcılara temel geometrik kavramların tanım ve çizimlerinin istendiği bir bilgi toplama formu uygulanmıştır. Çalışma kapsamında bu formda yer alan açı kavramına dair veriler analiz edilmiştir. Veriler nitel olarak analiz edilmiştir. Araştırmanın bulgularına göre katılımcıların açı çizimlerinde genellikle ölçüye veya iç bölgeye işaret ettikleri, tanımlarının da bu yönde olduğu görülmüştür. Öyle ki katılımcılar tanımlarının büyük çoğunluğunda açıyı ölçü, yer, bölge veya eğim olarak ifade etmişlerdir. Diğer taraftan katılımcıların tanım yaparken kullandıkları matematiksel dilin sıkıntılı olduğu görülmüştür.

SHS Web of Conferences, 2016

In the present study, it was aimed to explore the extent to which teachers' use of student thinki... more In the present study, it was aimed to explore the extent to which teachers' use of student thinking in mathematics classrooms. Two mathematics teachers working at public middle schools participated in the study. One of the teachers had six years of teaching experience and a master's degree in teaching mathematics. The other teacher was an inexperienced teacher with two years of teaching experience. Five lessons of each teacher, ten in total, were video-recorded. Transcripts of the video recordings were analyzed to answer two questions: Do the teachers attend to and remediate student difficulty? and To what extent does each teacher use student thinking? Analysis of the transcripts showed that the teacher with the graduate degree received higher scores with regards to attending to and remediating student difficulty, the second teacher received considerably lower scores on these aspects of teaching. It was observed that the first teacher frequently attended to student thinking and their answers regardless of correctness and made use of his lesson by turning them into an opportunity as well as constructing the target concepts, question types and descriptions. On the other hand, the second teacher failed to take student thinking further rather than using them and sometimes even disregarded their ideas.

The purpose of this study is to examine the effect of department and years spent in program on el... more The purpose of this study is to examine the effect of department and years spent in program on elementary and secondary mathematics pre-service teachers' mathematics teaching efficacy beliefs. The study was conducted with 318 pre-service teachers enrolled in elementary and secondary mathematics teacher education programs in the United States. The Mathematics Teaching Efficacy Belief Instrument (MTEBI, Enochs, Smith, & Huinker, 2000) was used to measure the participants' teaching efficacy beliefs. The results show that there was significant effect of department and years spent in the department on pre-service teachers' personal mathematics teaching efficacy scores. No significant effect of the department and years spent in the department of mathematics teaching outcome expectancy scores was observed. The results were discussed and teaching ideas for teacher educators were suggested.

The purpose of this study was to investigate first year elementary mathematics teacher education ... more The purpose of this study was to investigate first year elementary mathematics teacher education students' knowledge of prism. For this goal, the participants were asked to define the geometric concept of prism. The participants were 158 first year elementary mathematics teacher education students from a public university in Southern Turkey. The researchers analyzed the participants' definitions of prism. Additionally, 12 of the participants were selected for semi-structured interviews. The data were analyzed via content and frequency analysis techniques. Based on the content analysis, the themes that each participant used were determined. After this evaluation, the frequency of each of the themes was calculated. The findings indicated that the participants experienced difficulties in defining the concept of prism. It was also found out that the participants could not adequately use the mathematical language and define the concept.

The purpose of this study is to examine how the diverse members of the mathematics education comm... more The purpose of this study is to examine how the diverse members of the mathematics education community (in-service secondary mathematics teachers, in-service secondary mathematics teachers, university mathematicians and university mathematics educators) talk about a multimedia case study on mathematics teaching and learning when they interact both face-to-face and on-line. Also, the researchers compare on-line and face-toface discussions. Initial findings indicate that both on-line and face-to-face discussions of the case study promoted questioning, answering and informing among the participants.

Turkish Studies-Educational Sciences, 2021

The aim of this research is to determine the quality of mathematics teaching in middle school cla... more The aim of this research is to determine the quality of mathematics teaching in middle school classes. The research is qualitatively designed. The study group of the research is two middle school mathematics teachers. Within the scope of the research, 5 consecutive lessons of each of these middle school mathematics teachers were videotaped. The dialogues in the video recordings have been transcribed. Mathematical Quality of Instruction (MQI) scale was used for the analysis of the data obtained. This scale includes elements of mathematical content and is based on teacher-student-content relationship. In the scale, in determining the mathematical quality of instruction, many factors such as the density of the mathematical content in the lesson, the mathematical language, the way the teacher intervenes in student mistakes and errors, and the active participation of the students were taken into account. According to the findings obtained from the study, it was observed that the levels of one of the teachers' lessons were high in all dimensions of the MQI scale, and the level of the lessons of the other teacher was medium. It has been seen that İsmail teacher's students are busy in his lessons, students are given opportunities to practice, approaches that will improve their mathematical skills are used, he creates an environment where his students can express their ideas comfortably and justify their claims, and he supports the active participation of all his students. On the other hand, in the lessons of Hüseyin teacher, it has been seen that the operational information is generally given correctly, the students can express their thoughts easily, but a detailed interpretation is not made so that their reasoning skills can develop, and the students' ideas are weak in considering and using them. This result shows that the dialogues in the classroom, the roles that students have assumed within the lesson related to a subject or task, and the level of the teacher's teaching practices are important factors in determining the quality of teaching. * Bu makale birinci yazarın, "Matematik öğretim kalitesi ölçeği aracılığıyla ortaokul sınıflarında matematik öğretiminin kalitesinin belirlenmesi" başlıklı, ikinci ve üçüncü yazarların danışmanlığındaki yüksek lisans tezinden üretilmiştir. This article is drawn form the first author's master dissertation titled "Determining the quality of mathematics teaching in the middle school classroom with mqi scale method" within the supervision of second and third authors.

Sekulerlesmeyle birlikte ozellikle Bati toplumlarinda oldukca ilgi goren manevi danismanlik ve re... more Sekulerlesmeyle birlikte ozellikle Bati toplumlarinda oldukca ilgi goren manevi danismanlik ve rehberlik hizmetleri, ulkemizde de kurumsal olarak Diyanet Isleri Baskanligi’nin cami disi yeni bir din hizmeti olarak giderek yayginlasmaya baslamistir. Islami pratikleri merkeze alan Turkiye’deki manevi danismanlik hizmetlerinde danisan odakli manevi danismanlik uygulamasi henuz sistematik olarak yapilmamaktadir. Bu tur calismalarin ulkemizde gelismesine yardimci olmayi ve ilgili literaturun olusmasina katkida bulunmayi hedefleyen bu makalede, literatur taramasini temel alan dokumantasyon metodu kullanilarak konuya iliskin teorik bir degerlendirme yapilmistir. Bu makalenin amaci, Islam Peygamberi Hz. Muhammed’in manevi danismanlik baglaminda degerlendirilebilecek uygulamalarini “danisan merkezli psikoterapi” bilesenleri ozelinde psiko-teolojik acidan inceleyip adi gecen psikoterapi yaklasimi kapsaminda Hz. Muhammed’in manevi danisman rolunu ortaya koymaktir. Bu rolu ortaya koyarken salt ...

Gaziantep University Journal of Social Sciences, 2012

The purpose of this study was to identify and describe primary and upper elementary mathematics t... more The purpose of this study was to identify and describe primary and upper elementary mathematics teachers' views about the new elementary mathematics curriculum (NC). Data was collected from 22 teachers working in a district of Çorum through a semi-structure interview protocol and analyzed by qualitative methods. Participants claimed that the NC had positive influence on students' learning, teachers' and students' roles, and students' motivation. However, lack of time, materials, and students' prerequisite skills negatively influenced the NC's implementation. Teachers claimed that the NC did not consider local differences and teachers' guide book was insufficient in helping them. The study showed that although the teachers adopted the NC's ideas, more effective inservice training was needed to ensure its successful implementation

Kastamonu Eğitim Dergisi, 2019

SHS Web of Conferences, 2016

The purpose of this study is to examine the effect of department and years spent in program on el... more The purpose of this study is to examine the effect of department and years spent in program on elementary and secondary mathematics pre-service teachers' mathematics teaching efficacy beliefs. The study was conducted with 318 pre-service teachers enrolled in elementary and secondary mathematics teacher education programs in the United States. The Mathematics Teaching Efficacy Belief Instrument (MTEBI, Enochs, Smith, & Huinker, 2000) was used to measure the participants' teaching efficacy beliefs. The results show that there was significant effect of department and years spent in the department on pre-service teachers' personal mathematics teaching efficacy scores. No significant effect of the department and years spent in the department of mathematics teaching outcome expectancy scores was observed. The results were discussed and teaching ideas for teacher educators were suggested.

Turkish Studies-Educational Sciences, 2021

Gaziantep University Journal of Social Sciences, 2012