Pre-service teachers" first experiences and ideas prior to application affect their teaching activities. For this reason, it is aimed to determine transferring the experiences and ideas of prospective science teachers before lesson activities and its development with lesson activities. The study was carried out with 29 third year prospective teachers who attended the course named Laboratory Application II and undergraduate students at the Department of Science Education at Karadeniz Technical University during 2012-2013 spring semesters. The study was conducted by case study design. Thirty-minute lesson activities were carried out by them. Reflective writings constituted by candidates, lesson observations and plans were used as data collecting tools. They were examined through inductive thematic analyze. When compared before and during lesson activities process, it was determined that pre-service teachers" perception, ideas or application had changed at some concepts. This case might be a proof of development of pre service teachers" professional skills doing practice.

Energy is a difficult concept to be understood by students of all levels. Thus, the aim of the study is to determine how high school students at different levels perceive the energy and related concepts. In line with this purpose, 173 students in total of which 57 ones of the 9th grade, 94 ones of the 10th grade and 22 ones of the 11th grade participated in the study in which developmental research method of descriptive research design has been conducted. Four open-ended questions about energy and related concepts have been asked to the students in the study. As a result of the study, it is concluded that the students use energy instead of work, power, repulsion and pulling concepts and they consider energy as a feature specific to living creatures and moving situations. The potential and kinetic energy types are most expressed ones. The students frequently give examples from renewable and non-renewable energy types and they classify them accordingly. It is also concluded that they don't have enough information about conservation of energy. It is thought that this misconception among the students emerges because energy and related concepts are taught them disconnected in different lessons of different disciplines and they do not understand preconceptions about energy and related notions. It is considered that the concept networks, concept maps, and conceptual change texts will help to relate energy concepts in students' minds.

Öz Çalışmada lise öğrencilerinin bilim tarihi hakkındaki bilgi düzeylerinin tespit edilmesi amaçlanmıştır. Tarama modelinin kullanıldığı çalışmanın örneklemini Gümüşhane ilinde bir Anadolu lisesinde öğrenim gören 9. Sınıf (N= 30) ve 10. Sınıf (N= 57) öğrencileri oluşturmuştur. Verilerin toplanmasında dört soruluk açık uçlu bir anket kullanılmıştır. Elde edilen veriler içerik analizi doğrultusunda değerlendirilmiştir. Çalışma sonucunda öğrencilerin ilk uygarlıkların ve bilim insanlarının bilime katkısı, bilimsel bilgilerin zaman içerisindeki gelişimi ve bilimsel hikâyeler konusunda yetersiz ve eksik bilgilerinin olduğu ortaya çıkmıştır. Kazanımlarda bilim tarihine yönelik bilgilerin bulunmasına karşın öğrencilerin yeterli bilgilerinin olmaması bilim tarihine ders kitapları ve öğretmenler tarafından yeterince vurgu yapılamasına bağlanabilir. Bu sonuçlar doğrultusunda farklı disiplinlerle ilişkilendirilen bilim tarihi uygulamalarının öğrencilerin bilim tarihini anlamasına yardımcı olabileceği düşünülmektedir.

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When different disciplines that physics lesson is related are examined, it is seen that mathematics becomes prominent as one of the most used fields. Physics textbooks are the most significant resources to clarify this relationship. Therefore, in this study, it is aimed to analyze the involvement of mathematical knowledge in physics textbooks used during 2011-2012 and 2016-2017 academic year in Turkey and to evaluate them according to mathematics subject distribution. In line with this aim, 9 th , 10 th , 11 th , and 12 th-grade textbooks used in physics lessons during 2011-2012 and 2016-2017 academic years are examined through document analysis method. According to the research results, it is found that mathematical knowledge is mostly located in Force and Movement chapters in both physics textbooks belonging to two different years. The involvement of mathematical knowledge in the chapters can result from the fact that Force and Movement chapters are the most suitable chapters for daily practices of mathematics. Besides, it occurs that the most used mathematical knowledge is the category of numbers and operations. This is because of the fact that basic level knowledge is used more because all mathematical knowledge is based on numbers and four operations. In this respect, that mathematical knowledge involved in physics textbooks is very excessive stands as the most significant evidence for that there is a strong connection between physics and mathematics.