Browsing by Author "Tarkin Celikkiran, Aysegul"

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Determination of Preservice Chemistry Teachers' Understanding of Solubility Concept at Submicroscopic Level by Drawings
(dergipark Akad, 2019) Tarkin Celikkiran, Aysegul; Gokce, Cemal
The purpose of this study is to determine the level of teacher candidates' comprehension of chemical representations of solubility and the subject of solubility by particulate drawings. In the study, 36 chemistry teacher candidates who were studying in 3rd and 4th grade of Chemistry Teacher Education Program at Van Yuzuncu Yil University and Gazi University were selected as sample group. In addition, the case study, a qualitative research method, was determined as the research design in order to examine thoroughly the level of chemistry teacher candidates' comprehension of solubility. In the study, the data were collected by using a test that included particulate drawings with explanation about the solubility and the factors affecting it. By analyzing the data obtained from the test by content analysis method, answers of teacher candidates and their particulate drawings were evaluated as correct, partially correct and incorrect answer / drawing. Findings have shown that teacher candidates were insufficient in the level of understanding of the submicroscopic level. It has also been found that teacher candidates have difficulty in demonstrating molecules, ions, or particles at the submicroscopic level of solubility and the influencing factors.
Investigation of the Effects of Entrepreneurship-Oriented Stem Activities on 7th Grade Students' Entrepreneurship Skills and Perceptions
(Cukurova Univ, 2021) Sirin, Erdal; Tarkin Celikkiran, Aysegul
The aim of this study is to examine the effect of Entrepreneurship-oriented STEM activities, implemented in the context of Pure Substances and Mixture, on 7th-grade students' entrepreneurship skills and perception. "Embedded design" from the mixed method designs was utilized as the research design of the study. The study group consistsed of 23 students studying in the 7th-grade of a state school in the central district of Van in the fall semester of the 2019-2020 academic year. Entrepreneurship-oriented STEM activities were implemented through six-week modules. While quantitative data on students' entrepreneurship skills were obtained using Science-Based Entrepreneurship Scale, qualitative data on entrepreneurship perceptions were obtained through structured interviews. Paired sample t-test and Wilcoxon signed rank test were used for quantitative data analysis, content analysis method was used for qualitative data. Results indicated that the mean scores of taking risk, the need of success and communication skills increased and students' entrepreneurship perceptions improved at the end of the study. As a result, it was revealed that STEM activities where entrepreneurship skills are prioritized can improve students' perception and skills towards entrepreneurship.