Considering Alternative Reaction Mechanisms: Students' Use of Multiple Representations to Reason about Mechanisms for a Writing-to-Learn Assignment

Autor/inn/en	Watts, Field M.; Park, Grace Y.; Petterson, Michael N.; Shultz, Ginger V.
Titel	Considering Alternative Reaction Mechanisms: Students' Use of Multiple Representations to Reason about Mechanisms for a Writing-to-Learn Assignment
Quelle	In: Chemistry Education Research and Practice, 23 (2022) 2, S.486-507 (22 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Watts, Field M.) ORCID (Shultz, Ginger V.)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1756-1108
DOI	10.1039/d1rp00301a
Schlagwörter	Organic Chemistry; Science Instruction; Logical Thinking; Writing Assignments; College Students; College Science; Visual Aids; Peer Evaluation; Revision (Written Composition); Content Area Writing; Change; Introductory Courses + Suchen Sie Ihr Suchwort? Organische Chemie; Teaching of science; Science education; Natural sciences Lessons; Naturwissenschaftlicher Unterricht; Collegestudent; Anschauungsmaterial; Korrektur; Schriftliche Übung; Wandel; Einführungskurs
Abstract	Organic reaction mechanisms are often represented by the electron-pushing formalism and reaction coordinate diagrams. These representations pose a challenge to students because valuable information is encoded within each representation, and students must know how to reason about mechanisms using both. Hence, it is important to understand whether and how students consider these two representations when reasoning about reaction mechanisms. We have collected responses to a writing-to-learn assignment administered in a second-semester organic chemistry laboratory course to investigate students' reasoning. The assignment was designed to elicit students' reasoning about the most likely of two mechanisms for a catalyzed intramolecular aldol reaction when given the electron-pushing scheme and reaction coordinate diagram for both mechanisms. As part of the assignment, students submitted initial drafts, participated in content-focused peer review, and submitted revised drafts. We analyzed each component using a mixed methods approach to identify students' reasoning about the most likely reaction pathway and how their reasoning changed after peer review and revision. In this article, we present a quantitative overview of changes students made about their decisions for the most likely reaction pathway and how these changes are related to providing and receiving feedback. Additionally, we present our analysis of the features of representations students used to reason about the likelihood of alternative reaction mechanisms. This study demonstrates how existing research about students' reasoning with representations was operationalized for classroom practice using writing-to-learn. Furthermore, the analysis illustrates how writing-to-learn to can be used to develop students' reasoning and offers implications for teaching students to reason about reaction mechanisms using multiple representations. (As Provided).
Anmerkungen	Royal Society of Chemistry. Thomas Graham House, Science Park, Milton Road, Cambridge, CB4 0WF, UK. Tel: +44-1223 420066; Fax: +44-1223 423623; e-mail: cerp@rsc.org; Web site: http://www.rsc.org/cerp
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01