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Gkitzia, Vasiliki; Salta, Katerina; Tzougraki, Chryssa – Chemistry Education Research and Practice, 2020
Meaningful understanding of chemistry, among others, includes the ability of an individual to think simultaneously at macroscopic, submicroscopic and symbolic levels, and this presupposes the competence to translate between different types of chemical representations. In this study, we investigated 11th grade Greek students' and 3rd year…
Descriptors: Chemistry, Science Instruction, Grade 11, Secondary School Science
Koulougliotis, Dionysios; Antonoglou, Lemonia; Salta, Katerina – International Journal of Science Education, 2021
This study aims at investigating students' awareness of green chemistry principles (GCPs) which are infused in two context-based projects that are related to socio-scientific issues, namely climate change and materials' recycling. At first, content analysis of the projects' activities showed the infusion of four GCPs. Subsequently, the students'…
Descriptors: Foreign Countries, Chemistry, Science Instruction, Sustainability
Investigating High-School Chemical Kinetics: The Greek Chemistry Textbook and Students' Difficulties
Gegios, Theodoros; Salta, Katerina; Koinis, Spyros – Chemistry Education Research and Practice, 2017
In this study we present an analysis of how the structure and content of the Greek school textbook approaches the concepts of chemical kinetics, and an investigation of the difficulties that 11th grade Greek students face regarding these concepts. Based on the structure and content of the Greek textbook, a tool was developed and applied to…
Descriptors: Foreign Countries, Textbooks, Science Instruction, Chemistry
Vlacholia, Maria; Vosniadou, Stella; Roussos, Petros; Salta, Katerina; Kazi, Smaragda; Sigalas, Michael; Tzougraki, Chryssa – Chemistry Education Research and Practice, 2017
We present two studies that investigated the adoption of visual/spatial and analytic strategies by individuals at different levels of expertise in the area of organic chemistry, using the Visual Analytic Chemistry Task (VACT). The VACT allows the direct detection of analytic strategy use without drawing inferences about underlying mental…
Descriptors: Organic Chemistry, Expertise, Visual Perception, Spatial Ability
Vachliotis, Theodoros; Salta, Katerina; Tzougraki, Chryssa – Research in Science Education, 2014
The purpose of this study was dual: First, to develop and validate assessment schemes for assessing 11th grade students' meaningful understanding of organic chemistry concepts, as well as their systems thinking skills in the domain. Second, to explore the relationship between the two constructs of interest based on students' performance…
Descriptors: Science Instruction, Organic Chemistry, Grade 11, High School Students
Salta, Katerina; Tzougraki, Chryssa – Research in Science Education, 2011
The students' performance in various types of problems dealing with the conservation of matter during chemical reactions has been investigated at different levels of schooling. The participants were 499 ninth grade (ages 14, 15 years) and 624 eleventh grade (ages 16, 17 years) Greek students. Data was collected using a written questionnaire…
Descriptors: Low Achievement, Chemistry, Problem Solving, Correlation
Vachliotis, Theodoros; Salta, Katerina; Vasiliou, Petroula; Tzougraki, Chryssa – Journal of Chemical Education, 2011
Systemic assessment questions (SAQs) are novel assessment tools used in the context of the Systemic Approach to Teaching and Learning (SATL) model. The purpose of this model is to enhance students' meaningful understanding of scientific concepts by use of constructivist concept mapping procedures, which emphasize the development of systems…
Descriptors: Constructivism (Learning), Concept Mapping, Scientific Concepts, Program Effectiveness
Salta, Katerina; Tzougraki, Chryssa – Science Education, 2004
The development of valid and reliable instruments for attitudes' measurement has been proven crucial for the quality of research. This study is dealing with the development and validation of an attitude toward chemistry instrument. By using this instrument, 11th grade Greek students' attitudes regarding the difficulty, the interest, the usefulness…
Descriptors: Foreign Countries, Grade 11, Student Attitudes, Report Cards