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• W2915202012 abstract "In high school, learning chemistry mostly involves small molecules like water, or oxygen, or alcohols, or single atoms and ions. However, in the world around us large complex molecules like sugars, or fats, are at least as common. Students therefore often encounter these complex substances but are unable to transfer understanding to them. This problem may be diminished through visualization tools that all students can use to explore the molecular composition of substances and thus reduce confusion by their complexity.In this study, 3D representations of macromolecules, such as starch, compared to simpler molecules such as 2-butanol have been investigated. The aim is to explore whether the representations can help students understand the chemistry concepts that are implicit in their structures. The molecular structures were displayed using a visualization tool, Jmol, accepted to be very powerful. Jmol is commonly employed in university teaching. A website was developed to engage students in an exploration of 3D molecular structures using the Jmol applets.The focus was to demonstrate the elements and the scaffolding necessary so that students are supported in understanding the structure of macromolecules through visualizations. A pilot study was completed to develop the instruments used in the major study. The major study included university students (pre-service teachers) with recent experience in schools who worked with the modified website. The participants in this study had half an hour of self-study time with this website.Before and after the intervention, students completed questionnaires to reveal their prior knowledge as well as the understanding of the structure of macromolecules that took place, as a result of studying the website. The quantitative and qualitative data collected were analysed in a two-case study, because the number of participants in this project allowed only for this way of data analysis. The understanding of key features of stereoisomerism in large biochemical molecules by the participants was expected to be the result of their learning about molecules in general and macromolecules in particular.It was found that all participants experienced a certain amount of learning from the website. It was also found that collaborative learning impacted on results. It was also found that the visualizations and the scaffolding provided on the website were necessary but not sufficient to guarantee complex learning. More guidance with further instructions and initial orientation sessions needs to be offered to overcome technical problems and weaknesses in prior knowledge and visuospatial imagination." @default.
• W2915202012 created "2019-03-02" @default.
• W2915202012 creator A5021979617 @default.
• W2915202012 date "2018-09-07" @default.
• W2915202012 modified "2023-09-27" @default.
• W2915202012 title "Examining visualizations – the design of an online visualization module to support students' learning of structures of macromolecules" @default.
• W2915202012 doi "https://doi.org/10.14264/uql.2018.550" @default.
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