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Slepkov, Aaron D.; Vreugdenhil, Andrew J.; Shiell, Ralph C. – Journal of Chemical Education, 2016
There are numerous benefits to answer-until-correct (AUC) approaches to multiple-choice testing, not the least of which is the straightforward allotment of partial credit. However, the benefits of granting partial credit can be tempered by the inevitable increase in test scores and by fears that such increases are further contaminated by a large…
Descriptors: Multiple Choice Tests, Feedback (Response), Scores, Chemistry
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Erk, Kendra A.; Rhein, Morgan; Krafcik, Matthew J.; Ydstie, Sophie – Journal of Chemical Education, 2015
An educational activity is described in which the structure and physical properties of disposable plastic cups were directly related to the method of processing. The mechanical properties of specimens cut from the walls of poly(ethylene terephthalate) (PETE) cups, oriented parallel and perpendicular to the thermoforming direction, were measured in…
Descriptors: Plastics, Science Instruction, Chemistry, Scientific Concepts
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Jurowski, Kamil; Krzeczkowska, Malgorzata Krystyna; Jurowska, Anna – Journal of Chemical Education, 2015
The concept of oxidation state (or oxidation number) and related issues have always been difficult for students. In addition, there are misunderstandings and obscurities, which can cause improper balancing of the chemical equations (mostly in organic reactions). In particular, these problems are related to determination of the oxidation state of…
Descriptors: Science Instruction, Secondary School Science, College Science, High Schools
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Brandriet, Alexandra R.; Bretz, Stacey Lowery – Journal of Chemical Education, 2014
This article describes the development of the Redox Concept Inventory (ROXCI) as a measure of students' understandings and confidence of both the symbolic and particulate domains of oxidation-reduction (redox) reactions. The ROXCI was created using a mixed-methods design in which the items were developed based upon themes that emerged from…
Descriptors: Science Instruction, Chemistry, Semi Structured Interviews, Evaluation Methods
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Giles, Richard; Kim, Iris; Chao, Weyjuin Eric; Moore, Jennifer; Jung, Kyung Woon – Journal of Chemical Education, 2014
An efficient laboratory experiment has been developed for undergraduate students to conduct hydrogen-deuterium (H-D) exchange of resorcinol by electrophilic aromatic substitution using D[subscript 2]O and a catalytic amount of H[subscript 2]SO[subscript 4]. The resulting labeled product is characterized by [superscript 1]H NMR. Students also…
Descriptors: Science Experiments, Science Instruction, Science Laboratories, College Science
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Schwartz, Paul; Barbera, Jack – Journal of Chemical Education, 2014
Data produced by psychometric instruments are often used to inform understanding about a certain population's knowledge of ideas or perspectives about specific topics. Concept inventories are an example of psychometric instruments used to probe students' content knowledge within a defined framework. Concept inventories have been used as…
Descriptors: Psychometrics, Scientific Concepts, Science Education, Chemistry
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Kelly, Resa M. – Journal of Chemical Education, 2014
Molecular visualizations have been widely endorsed by many chemical educators as an efficient way to convey the dynamic and atomic-level details of chemistry events. Research indicates that students who use molecular visualizations are able to incorporate most of the intended features of the animations into their explanations. However, studies…
Descriptors: Science Instruction, High Schools, Secondary School Science, Chemistry
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Tang, Hui; Kirk, John; Pienta, Norbert J. – Journal of Chemical Education, 2014
This paper includes two experiments, one investigating complexity factors in stoichiometry word problems, and the other identifying students' problem-solving protocols by using eye-tracking technology. The word problems used in this study had five different complexity factors, which were randomly assigned by a Web-based tool that we developed. The…
Descriptors: Science Instruction, Science Experiments, Eye Movements, Stoichiometry