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Freshman chemistry student teachers' ability to balance chemical equations: performance, procedure and the effect of applet use
Hamerská, Lucie ; Rusek, Martin (advisor) ; Bílek, Martin (referee)
The research undertaken for this master thesis mapped the students' ability to evaluate chemical equations. Three main aspects were investigated: success in balancing equations, procedures and the use of the applet environment. The research sample consisted of 11 freshmen chemistry student teachers. Eye-tracking in combination with retrospective think-alouds and interviews were used to analyze the students' procedures. This thesis builds on the author's previous bachelor thesis and uses findings from the evaluation of pre-tests that addressed basic chemistry concepts in the area of particulate nature of matter and the ability to work with chemical representations with a special focus on chemical equations. The results of the research highlight the gap between conceptual understanding of the topic of chemical equations and algorithmic ability to balance chemical equations. Only five students out of 11 achieved the same results in the individual parts of the research. The achievement of more than half of the students was below what is expected at the upper secondary level. Analysis of the procedures identified problems in the students' equation balancing that may have affected their success - basic mathematical skills, omitting the final check, having to use higher values of stoichiometric...
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Freshman chemistry teacher students' understanding of basic chemical concept and corresponding representations with a special focus on chemical equations
Hamerská, Lucie ; Rusek, Martin (advisor) ; Bílek, Martin (referee)
This bachelor thesis deals with the topic of chemical equations as one of the basic chemical concepts. The theoretical part is devoted to the teaching of chemistry from the point of view of curriculum documents, the specifics of this school subject are presented, and the chemical triplet of representations is introduced. Subsequently, the thesis takes a closer look at the topic of chemical equations and their balancing. The eye-tracking method is also briefly introduced. The aim of this bachelor thesis is to map freshman chemistry teacher students' understanding of the particulate nature of matter, with an emphasis on chemical equations as a transcript of chemical reactions. The research combines both quantitative and qualitative methods. Twenty-four students participated in the initial written testing. Based on their performance on the test, students were divided into three categories. For the next phase of the research, the sample was narrowed down to 11 respondents. The eye-tracking method combined with think-aloud and interviews was used to obtain more detailed information. While the written pretest mainly tested knowledge of basic chemical concepts, the eye-tracking pretest focused more specifically on chemical equations and their presentation using different chemical representations. Success...
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Insights about Chemistry Education Gained in the Time of COVID-19
Hamerská, Lucie ; Rusek, Martin (advisor) ; Beneš, Pavel (referee)
This bachelor's thesis deals with the topic of distance learning and its conception by chemistry teachers during the COVID-19 pandemic. The theoretical part briefly characterizes the teacher's concept of teaching and its components, the distance form of teaching, its development, principles and effectiveness. Subsequently, attention is paid to the current situation regarding distance education during a pandemic and there is specific focus on teaching chemistry. The transition to the distance form of education was a great challenge for the teaching of chemistry as a subject, which includes not only theoretical but also practical knowledge. Every teacher took a different approach. The aim of the work is to map and present the approaches of several teachers to distance teaching of chemistry, the conditions for distance teaching, both on the part of teachers and on the part of students, and the experience with teaching concieved in such way. The research survey in the form of an interview was attended by 16 respondents. The questions concerned three main areas, namely the technical implementation of distance learning, pedagogical aspects of teaching and the impact of distance learning on educational content. The statements were analyzed using the open coding method. The findings show that at the level...
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