The purpose of this study was to improve preservice chemistry teachers' understanding of surface tension by using guided-inquiry activities. Ten preservice chemistry teachers participated in this study. Data were collected with open-ended questions on the effect of molecular weight, branching, and temperature on surface tension before and after guided-inquiry. The results indicated that most of the participants had difficulties in understanding surface tension and could not provide scientific explanations before the guided-inquiry activities. However, after the guided-inquiry activities, most of the participants were able to provide true or partially true responses and also to present scientific justifications in terms of the effect of molecular weight and the effect of branching on surface tension. Moreover, the study revealed that guided-inquiry activities immensely helped participants to understand the effect of temperature on surface tension, especially when compared to the effect of the other two factors. The study found that guided-inquiry activities improved the understanding of the preservice chemistry teachers about surface tension. In light of the results of this study, implications are stated for preservice chemistry teacher education and chemistry education researchers.

This study aims to determine the topic-specific nature of two experienced chemistry teachers’ pedagogical content knowledge (PCK) in the topics of interactions between chemical species and states of matter. The...

The purpose of this study was to develop pre-service chemistry teachers’ pedagogical content knowledge (PCK) regarding atoms and the periodic table via mentoring. Two pre-service chemistry teachers with different levels of academic achievement participated in the study. The development of the participants’ PCK was investigated in terms of the following components: orientations toward science teaching, knowledge of curriculum, knowledge of instructional strategies, knowledge of learners, and knowledge of assessment. The data of this study were collected over four months using multiple data collection tools, including semi-structured interviews, observations, content representations, card-sorting activities, and field notes. The results of this study provided evidence for the relationship between the development of PCK and mentoring. However, as a result of the mentoring, it was determined that the improvements in the PCK components did not occur at the same levels for these participants. One of the participants had an advanced level of improvement in all PCK components through mentoring, while the other participant had varying levels of improvement in PCK components. It was found that the more academically successful participant had more advanced development in all components of PCK as a result of mentoring. For the other participant with lower academic achievement, there was no improvement in some respects of PCK components. According to the results of this study, it can be said that the development of PCK can be fostered through mentoring in pre-service chemistry teacher education. In light of the results of this study, implications are stated for in-service chemistry teacher education, pre-service chemistry teacher education, and chemistry education researchers.

Due to the COVID-19 pandemic, mandatory changes were required in the field of education, as in many other fields. One of these fields is a teacher training programme, which includes teaching practice. It has become of great importance that pre-service science teachers, who frequently include experiments in their teaching practices in face-to-face education, will carry out this process in online education. This process, experienced due to the COVID-19 pandemic, prompted pre-service science teachers to find something that could replace the wet labs. One of the solutions in this situation is for them to choose and use appropriate Web 2.0 tools in their online lab teaching practices. Therefore, the purpose of the study was to examine the Web 2.0 tools used by pre-service chemistry teachers in their online teaching practices in a distance education environment, the purposes of using these tools, and their justifications for preferences to use these tools. This study was conducted with 15 pre-service chemistry teachers. Data were collected via observations, a form filled out by the participants, and semi-structured interviews in this study. According to the results of this study, it was determined that the participants used 17 Web 2.0 tools during their online teaching practices. The findings highlighted that the most used Web 2.0 tools were Perculus+ chat, Google docs, and Quizizz. Moreover, it was determined that the participants used these tools for 21 different purposes such as drawing students’ attention, getting hypotheses, and designing experiments. The results also indicated that the participants emphasised the ease of the Web 2.0 tool as a justification for the preference for almost all of the Web 2.0 tools they use, regardless of their purposes for using these tools. It is thought that the results can be used to show how to make online or face-to-face teaching practices in teacher training programmes by using Web 2.0 tools more effective in the future.

Öz: Bu çalışmanın amacı, kimya öğretmen adaylarının değerlendirmeye ilişkin bakış açılarını tespit etmek ve bu bakış açılarının özel öğretim yöntemleri-II dersi sonucundaki değişimini incelemektir. Çalışma 13 kimya öğretmen adayı ile yürütüldü. Öğretmen adaylarının değerlendirmeye ilişkin bakış açılarını belirlemek için yedi adet açık uçlu sorudan oluşan bir test veri toplama aracı olarak kullanıldı. Çalışmanın bulgularına göre özel öğretim yöntemleri-II dersi sonucunda kimya öğretmen adaylarının değerlendirmeye ilişkin bakış açılarında değişimler ve çeşitlilikler tespit edildi. Araştırmada; çalışma başlangıcında "hangi amaçlarla değerlendirme yapılmalıdır?" sorusuna katılımcıların neredeyse tamamından değerlendirme, anlama ve performans düzeyini belirlemek için "sonuç değerlendirme" amacıyla yapılmalı cevabı alınırken çalışma sonucunda "sonuç değerlendirme" yanında "teşhis değerlendirme" ve "süreç değerlendirme" amacıyla da değerlendirme yapılabileceği fikirlerine dönüştüğü tespit edildi. Benzer şekilde çalışma başlangıcında "sadece konu sonu ve ders sonunda değerlendirme yapılmalıdır" fikri, "dersin her anında değerlendirme" yapılabileceği fikrine dönüştü. Ayrıca değerlendirmenin sadece bilişsel kazanımları değil ilgi, tutum, motivasyon gibi duyuşsal kazanımları da kapsaması ve öğrencilere verilecek geri bildirimin bireysel ve motive edici olması gerektiğini düşündükleri tespit edildi.