## Territory is but the body of a nation. The people who inhabit its hills and valleys are its soul, its spirit, its life.

**Dissertation:** Bridging the Gap Between Set Theory and Logic: Leveraging Computing as a Mediating Tool for Learning

**Chair:** Chris Rasmussen

**Title: **position at California State University, Long Beach

**Dissertation:** Teaching Data for Social Justice to Pre-Service Mathematics Teachers

**Chair:** Bill Zahner

**Title: **Data Scientist at Duo Security

**Dissertation:** Exploring Lesson Study as a Model of Professional Development for Higher Education Chemistry Instructional Teams

**Chair:** Stanley Lo & Stacey Brydges

**Title:** Research Scientist at Vala Sciences, Inc.

**Dissertation: **Exploring Chemistry Graduate Student Identity Development and the Intersection of Multiple Sub-Identities

**Chair: **Regis Komperda

**Title: **Postdoctoral Associate, Chemistry, North Texas University

**Dissertation: **Supporting College Algebra Students’ Learning: Unpacking One Institution's Implementation of the Corequisite Model

**Chair: **Daniel Reinholz

**Title: **Amelia Stone-Johnstone currently has a position at California State University, Fullerton

**Dissertation: **Exploring the Relationship between Teacher Professional Noticing and Responsive Teaching in Experienced Secondary Science Teachers

**Chair: **Meredith Houle Vaughn

**Title: **Lauren Emery is currently teaching at Steele Canyon High School in Spring Valley, California.

**Dissertation: **Transforming Precalculus to Calculus 2: A Longitudinal Study of Social and Structural Change in a University Mathematics Department

**Chair: **Chris Rasmussen

**Title: **Assistant Professor of Mathematics Education, School of Mathematical and Statistical Sciences, Arizona State University

**Dissertation: **The Development of Mathematical Knowledge for Teaching for Quantitative Reasoning using Video-Based Instruction

**Chair: **Joanne Lobato

**Title: **Assistant Professor, Department of Mathematics and the Center for Science and Mathematics Education, Weber State University

**Dissertation: **Exploring the Relationships between Emergent Mathematical Practices, Individuals' Ways of Reasoning, and Meanings Constructed through Discourse

**Chair: **Joanne Lobato

**Title: **Assistant Professor, Department of Mathematical Sciences, Michigan Technological University

**Dissertation: **Preparing Future College Instructors: The Role of Graduate Student Teaching Assistants (GTAs) in Successful College Calculus Programs

**Chair: **Chris Rasmussen

**Title: **Associate Professor, Department of Mathematics, Colorado State University, Fort Collins

**Dissertation: **Teachers' Beliefs Regarding the Generalization of Students' Learning and How to Support the Generalization of Students' Learning

**Chair: **Joanne Lobato

**Title: **Associate Professor, Department of Mathematics and Science Education, University of Georgia, Athens

**Dissertation: **The Hidden Strand of Mathematical Proficiency: Defining and Assessing for Productive Disposition in Elementary School Teachers' Mathematical Content Knowledge

**Chair: **Randy Philipp

**Title: **Associate Professor, Department of Mathematics and Statistics, James Madison University

**Dissertation: **Investigating Number Sense Development in a Mathematics Content Course for Prospective Elementary Teachers

**Chair: **Susan Nickerson

**Title: **Associate Professor in Elementary Mathematics Education, School of Teacher Education, Florida State University, Tallahassee

**Dissertation: **Individual and Collective Analysis of the Genesis of Student Reasoning Regarding the Invertible Matrix Theorem in Linear Algebra

**Chair: **Chris Rasmussen

**Title: **Associate Professor, Department of Mathematics, Virginia Polytechnic Institute and State University

**Dissertation: **The Use of Self-Determination Theory to Foster Environmental Motivation in an Environmental Biology Course

**Chair: **Alexander Chizhik

**Title: **Associate Professor, Department of Biology and Director, Center for Science, Mathematics and Technology, Illinois State University, Normal

**Dissertation: **Rethinking Biology Instruction: The Application of DNR-Based Instruction to the Learning and Teaching of Biology

**Chairs: **Guershon Harel & Gabriele Wienhausen

**Title: **Professor, Department of Biology; Director of the University Now Program, Point Loma Nazarene University, San Diego

**Dissertation: **Students' Development of Models of Magnetic Materials

**Chair: **Fred Goldberg

**Title: **Assistant Professor of Physics, School of Natural Sciences; Associate Director of the Center for the Advancement of Math and Science Education, Black Hills State University, South Dakota