Student Reasoning in Organic Chemistry Research Advances and Evidence-based Instructional Practices Advances in Chemistry Education Series Editor-in-chief: Keith S. Taber, University of Cambridge, UK Series editors: Avi Hofstein, Weizmann Institute of Science, Israel Vicente Talanquer, University of Arizona, USA David Treagust, Curtin University, Australia Editorial Advisory Board: Mei-Hung Chiu, National Taiwan Normal University, Taiwan, Rosaria da Silva Justi, Universidade Federal de Minas Gerais, Brazil, Onno De Jong, Utrecht University, Netherlands, Ingo Eilks, University of Bremen, Germany, Murat Kahveci, Çanakkale Onsekiz Mart University, Turkey, Vanessa Kind, Durham University, UK, Stacey Lowery Bretz, Miami University, USA, Hannah Sevian, University of Massachusetts Boston, USA, Daniel Tan, Nanyang Technolog- ical University, Singapore, Marcy Towns, Purdue University, USA, Georgios Tsaparlis, University of Ioannina, Greece. Titles in the Series: 1: Professional Development of Chemistry Teachers: Theory and Practice 2: Argumentation in Chemistry Education: Research, Policy and Practice 3: The Nature of the Chemical Concept: Re-constructing Chemical Knowl- edge in Teaching and Learning 4: Creative Chemists: Strategies for Teaching and Learning 5: Engaging Learners with Chemistry: Projects to Stimulate Interest and Participation 6: The Johnstone Triangle: The Key to Understanding Chemistry 7: Problems and Problem Solving in Chemistry Education 8: Teaching and Learning in the School Chemistry Laboratory 9: Nanochemistry for Chemistry Educators 10: Student Reasoning in Organic Chemistry: Research Advances and Evi- dence-based Instructional Practices How to obtain future titles on publication: A standing order plan is available for this series. A standing order will bring delivery of each new volume immediately on publication. For further information please contact: Book Sales Department, Royal Society of Chemistry, Thomas Graham House, Science Park, Milton Road, Cambridge, CB4 0WF, UK Telephone: +44 (0)1223 420066, Fax: +44 (0)1223 420247 Email: [email protected] Visit our website at www.rsc.org/books Student Reasoning in Organic Chemistry By Nicole Graulich Justus-Liebig-University Gießen, Germany Email: [email protected] and Ginger Shultz University of Michigan, USA Email: [email protected] Advances in Chemistry Education Series No. 10 Print ISBN: 978-1-83916-491-0 PDF ISBN: 978-1-83916-778-2 EPUB ISBN: 978-1-83916-779-9 Print ISSN: 2056-9335 Electronic ISSN: 2056-9343 A catalogue record for this book is available from the British Library © Royal Society of Chemistry 2023 All rights reserved Apart from fair dealing for the purposes of research for non-commercial purposes or for private study, criticism or review, as permitted under the Copyright, Designs and Patents Act 1988 and the Copyright and Related Rights Regulations 2003, this publication may not be reproduced, stored or transmitted, in any form or by any means, without the prior permission in writing of The Royal Society of Chemistry or the copyright owner, or in the case of reproduction in accordance with the terms of licences issued by the Copyright Licensing Agency in the UK, or in accordance with the terms of the licences issued by the appropriate Reproduction Rights Organization outside the UK. 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The Royal Society of Chemistry is a charity, registered in England and Wales, Num- ber 207890, and a company incorporated in England by Royal Charter (Registered No. RC000524), registered office: Burlington House, Piccadilly, London W1J 0BA, UK, Telephone: +44 (0) 20 7437 8656. For further information see our website at www.rsc.org Printed in the United Kingdom by CPI Group (UK) Ltd, Croydon, CR0 4YY, UK Dedication Dedicated to the memory of Prof. George Bodner (08 March 1946–19 March 2021), Purdue University, who inspired so many over decades in their love for organic chemistry education. Advances in Chemistry Education Series No. 10 Student Reasoning in Organic Chemistry: Research Advances and Evidence-based Instructional Practices Edited by Nicole Graulich and Ginger Shultz © The Royal Society of Chemistry 2023 Published by the Royal Society of Chemistry, www.rsc.org v Foreword “How do we know what we know?” sounds like a trivial question but it is not. To differentiate between justified belief and opinion has never been more important in the sciences, and especially in the public perception of science in general. This epistemology is one of the pillars upon which sci- ence and all rational action and reasoning is built upon. As the title Student Reasoning in Organic Chemistry reveals, the present book edited by Nicole Graulich and Ginger Shultz analyses the teaching of organic chemistry with the goal to improve chemistry instruction. It therefore fills a long apparent, but never systematically addressed, knowledge gap regarding the outcome of our instructional efforts by highlighting current advances in chemistry edu- cation research. From a very personal perspective, I realize that when I draw an organic reaction mechanism, I hope the students will follow my drawings and my words and it all makes sense. Sometimes I realize that I am not quite sure whether the things I draw are simply memorised to understand the outcome of a reaction—sort of a mnemonic trick—or, if I have reasons to believe that this particular mechanistic hypothesis is close to some “scientific reality”. How hard is it to accept that an electron pair is a curved arrow from which most of the action originates? Can the students visualize chemical structures in three dimensions from some simple stick drawings that are in all honesty quite a leap of faith? Will different representation styles add to the students’ comprehension or confusion? There are many more questions of this sort that are highly relevant but often not discussed. I am pleased to see that the present book picks up where these questions leave me. I’ve spoken to colleagues about this and many feel similarly. Still, there are no systematic efforts to determine whether the applied teaching meth- ods, the language, or the pictorial framework ultimately leads to a deep Advances in Chemistry Education Series No. 10 Student Reasoning in Organic Chemistry: Research Advances and Evidence-based Instructional Practices Edited by Nicole Graulich and Ginger Shultz © The Royal Society of Chemistry 2023 Published by the Royal Society of Chemistry, www.rsc.org vii viii Foreword understanding of organic reaction mechanisms that would allow the stu- dents to reason rationally about the outcome of a reaction that they have not yet seen before. I am quite impressed that the present book tackles these issues with a very fresh look, often including very modern assessment tools of students as well as teacher habits and performances. As I teach organic reaction mechanisms myself, this book comes quite handy, and I comple- ment the Editors on their efforts to put such a valuable resource together. I am sure you will benefit from this collection of excellent articles just as much and hope you enjoy the reading! Dr Peter R. Schreiner Liebig-Chair and Professor of Organic Chemistry Justus Liebig University Giessen, Germany President, German Chemical Society (GDCh, 2020 & 2021) Preface Eliciting, Supporting, and Assessing Reasoning Reasoning is a critical aspect of chemistry that students must learn to become full participants in the discipline. However, reasoning is inherently complex and science education researchers have struggled to consistently define and, consequently, to capture patterns of reasoning in student dis- course and coursework. We seek to understand reasoning to move beyond the teaching of chemistry as a disconnected set of ideas and to improve the outcomes of chemistry instruction. In chemistry broadly, we have examined various types of reasoning that are distinctive of our discipline such as math- ematical reasoning,1,2 reasoning with chemical representations,3,4 mechanis- tic reasoning,5–7 and argumentation.8–10 Organic chemistry as a subfield of chemistry requires reasoning that is distinct from other subfields. We know that typical organic chemistry instruction often fails to effectively promote reasoning and relies on assessments that emphasize rote memorization rather than an understanding of underlying phenomena. This recognition has led to an emerging focus on reasoning in organic chemistry that is cap- tured in the chapters of this book including studies examining the role of representations, in-depth studies of complex reasoning, classroom teaching practices designed to promote reasoning, and approaches to the formative assessment of reasoning. The first section of the book covers research on student representational competence. Understanding and interpreting visual complex representa- tions is a primary challenge in organic chemistry learning. The contribu- tions highlight how using representations in learning are perceived and Advances in Chemistry Education Series No. 10 Student Reasoning in Organic Chemistry: Research Advances and Evidence-based Instructional Practices Edited by Nicole Graulich and Ginger Shultz © The Royal Society of Chemistry 2023 Published by the Royal Society of Chemistry, www.rsc.org ix x Preface understood by students. While solving organic chemistry tasks students often struggle to understand the underlying meaning of reaction mecha- nisms and electron-pushing formalism. Little is known about what students visually focus on while evaluating the plausibility of reaction mechanism and how that relates to the types of features they discuss in their reason- ing. Weinrich & Britt make use of eye-tracking, followed by think-aloud inter- views, to examine how students visually focus on curved arrows and how this relates to the students’ mentions of explicit and implicit features of the given representation. The study demonstrates eye-tracking technology as a valuable tool to examine how a feature (e.g., curved arrows) is focused on while evaluating reaction mechanisms and how these insights can be used to derive implications to support students’ mechanistic reasoning [Section A, Chapter 1]. Keller & Habig qualitatively investigate if students working on tasks involving stereochemistry and pericyclic reactions with augmented-re- ality support incorporated spatial aspects into their explanations compared to those working without augmented-reality [Section A, Chapter 2]. Learners who used the augmented-reality app tend to be able to involve spatial aspects in their reasoning more often and were able to conduct rotation operations correctly compared to the control group. The work by Ward, Rotich, Hoang & Popova draw on the seminal work from Kozma and Russel (1997) and com- bined it with Schönborn and Anderson’s model (2008) to characterize how organic chemistry students interpret, translate, generate, and use dash-wedge diagrams and Newman projections [Section A, Chapter 3]. This work demon- strates that the appropriateness of student reasoning can vary across tasks focusing on different representations, different representational compe- tence skills, and whether the student attends to the external features or the conceptual information embedded in the representation. The second selection of contributions highlights approaches to describe student reasoning about reaction mechanisms expressed in written or verbal contexts. Various frameworks have been used in the last decades that cover aspects of causality and mechanistic reasoning. The chapters in this section illustrate an in-depth analysis of students being engaged with organic chem- istry tasks, argumentation, and in-class discourse. Crandell & Cooper pro- vide a synthesis of their research on causal mechanistic reasoning as they have applied it, a description of evidence-based strategies used to engage students in reasoning and modelling, and findings from two longitudinal studies [Section B, Chapter 4]. The longitudinal studies both compare stu- dents in traditional introductory courses to those in CLUE courses, designed to elicit causal mechanistic reasoning. Their findings speak to the impor- tance of instruction that is designed to elicit reasoning. Deng, Carle & Flynn illustrate an argumentation framework focusing on reasoning, granularity, and comparisons to characterize students’ arguments in organic chemistry and make use of a constructive alignment approach to guide teaching and assessment [Section B, Chapter 5]. The third chapter by Asmussen, Rodemer, Eckhard & Bernholt investigates undergraduate students’ verbal explana- tions to a series of case comparisons on nucleophilic substitution reactions