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National Repository of Grey Literature 1 records found  Search took 0.00 seconds. 
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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