UMD Center for Math Ed Doctoral Students

Center for Mathematics Education (CFME)

Doctoral Students


Veronica Carlan

Veronica Carlan earned her undergraduate degree in mathematics from the University of Virginia and her master’s degree in mathematics and statistics from Georgetown University. She was then a data scientist before switching to teach at community college. Most recently she developed and taught online data analysis courses. Veronica’s research interests center around adult online education, particularly in data-centered courses.

Francesca Henderson

Francesca Henderson is from Southern California an holds a Bachelor's of Mathematics from San Diego State University (2011), a Master's in Mathematics Education from Concordia University in Portland Oregon (2015), and a Master's degree in Educational Leadership from the High Tech High Graduate School of Education in San Diego (2018). During her professional career she has served as a researcher, 9-12 math teacher, Vice Principal, and Education Consultant. Through her diverse experiences in education, she developed a passion for social justice and equity. Thus, her research interests are embedded in social justice mathematics education, the transition from high school to college-level mathematics learning, and culturally responsive pedagogy. 

Headshot of Michael Krell

Michael W. Krell is a Maryland native who holds a BA in philosophy and the history of math and science from St. John’s College and an MA in German and European studies from Georgetown University’s School of Foreign Service. He spent five years teaching secondary STEM courses in the International Academy at Cardozo Education Campus in Washington, DC, where he created and adapted curriculum focused on serving multilingual learners, led professional development sessions at the district level, served as mathematics department chair, and completed a Modern Classrooms Fellowship in 2019-20. Prior to becoming a teacher, he worked in the field of international development. His interests center on multilingual learners in the secondary mathematics classroom.

Milen M. Matthews

Milen M. Matthews is a native of Louisiana with a Bachelor’s of Elementary Education from The University of Louisiana in Lafayette and a Master’s in Educational Leadership and Administration from Lamar University in Beaumont, Texas. During his professional career he served as a 1st-6th grade math and science teacher, Assistant Principal, School Community Liaison, and Black Boy Mentor. As a Black male educator in a predominately white, female profession, Milen has developed research interests that embody diversity and equity in early childhood & elementary mathematics classrooms, impacts on student identity for youth of color, and the recruitment & retention of Black male teachers.


Peter Moon Headshot

Peter Moon is a Connecticut native with a Bachelor’s in Psychology from the University of Pennsylvania (2017) and a Master’s in Teaching (Secondary Mathematics) from Loyola University Maryland. He taught Geometry, AP Statistics, and C++ in Baltimore, MD for three years while coaching swimming. Currently, he teaches a course in statistics for undergraduate middle grades pre-service teachers. Peter’s research interests include expression of algebraic and pre-algebraic thinking, computational thinking tasks leading to mathematical learning, and learning through games. 


Photo of a man with short brown hear wearing a red suit jacket outside

Luis Royo Romero is a doctoral student in the department of Teaching and Learning, Policy and Leadership with an emphasis in Mathematics Education at the University of Maryland. He holds a master’s in Teaching in Secondary Mathematics from Loyola University Maryland, a master’s in Physics from Bowling Green State University, and a bachelor’s degree in Mathematics and Physics from High Point University. His current research focuses on how policies, teacher pedagogies, and classroom ecology impact multilingual-multicultural students’ outcomes in K-12 mathematics. Luis is a former high school math teacher and undergraduate physics lab instructor. 

Matthew Wilson

Matt Wilson, a Maryland native, graduated from Washington University in St. Louis with a bachelor's in Mathematics in 2016 and earned a Master's degree in Math Education from University of Maryland. On campus, he has been an instructor in the Developmental Math and uTERP programs since 2018. His research interests lie in the intersection of curriculum, cognition, and equity. Thus, Matt is passionate about queer, feminist, and critical math pedagogy and empowering underrepresented populations in STEM fields.


Headshot of doctoral student Mary Zimmerman

Mary Ziegler Zimmerman earned her BFA in Studio Art from Truman State University and M.Ed in Curriculum and Instruction from the University of Washington. After working in outdoor education, she transitioned to teaching for Denver Public Schools, serving as a teacher and leader at the middle and elementary levels in mathematics and special education. Her experiences mentoring, coaching, and evaluating new and experienced teachers led to her interest in mathematics teacher education, teacher cognition, and implementation of equity-based mathematics instructional practices.


Sherwin Collette, headshot, wearing a suit and bowtie

Sherwin Collette is the Senior Vice President for Montgomery College’s administrative and fiscal services.  Collette formerly was an associate superintendent for Montgomery County Public Schools’ Office of Engagement and Labor Relations, according to a statement from Pollard. His research interests center on supporting community college students access mathematics education necessary to help them pursue their future endeavors. 


Kellyn Farrow, CfME student, headshot

Kellyn Farlow-Morris has a bachelor's and a master's degree in Mathematics Education from Brigham Young University. Prior to attending UMD, she was an active participant in an ongoing research community doing research in mathematics education. During this time Kellyn worked on three different projects involving pre-service and in-service elementary school teachers and undergraduate students majoring in Dance. Her thesis research was based on data from an experimental teaching project with dance students. These students were invited, through real-world problem tasks that raised central conceptual issues, to invent major ideas of calculus. The focus of Kellyn's research was on the work and the thinking of the students, as they sought to build key ideas, representations, and compelling lines of reasoning. Kellyn is still highly interested in student thinking, especially student proof development and representational use. She has continued to be a part of similar work here at UMD in both the Case Studies and Necessity Project research groups.  ResearchGate

Matt Griffin, headshot, blue shirt

Matt Griffin's primary research interests are urban education, teachers' mathematical knowledge and mathematics education policy. He is also interested in the use of technology in mathematics education and students' learning of geometry. Before arriving at UMD, Matt taught secondary mathematics for four years and, prior to that, worked in the actuarial industry for over a decade.  ResearchGate


Josh Himmelsbach

Josh Himmelsbach earned his bachelor’s degree in mathematics from Harvard, and taught middle and high school mathematics for five years in Rockville, MD. He then returned to school and earned a Master’s degree in Mathematics from the University of Maryland. While teaching as a graduate student he became interested in undergraduate mathematics and teacher prep curriculum. Josh is currently a full-time faculty member in the department of mathematics at the Catholic University of America.


Chris Hurst, CfME, red shirt

Chris Hurst is a UMD grad both for a Bachelor's in Mathematics and a Master's in Curriculum and Instruction, making him a lifelong Terps fan.  He also currently teaches Pre-Calculus, AP Calculus, and AP Economics at DeMatha Catholic High School in Hyattsville, MD.  He is interested in the influence of policy on mathematics classrooms, specifically regarding teacher professionalism issues in both public and nonpublic schools.  He lives in Bowie with his wife Alison, children Sean and Nora, and part-yellow lab-part-hurricane Hunter.


Darren Smith, head shot

Darren Smith is a math professor at Montgomery College, Germantown campus. He  has served as department chair and been a critical member of the Collegewide Assessment Team that identifies needs and develops recommendations regarding college-wide assessment of student learning in order to strengthen the college and enhance its accountability. Darren’s research is centered around how math tutoring serves as a gateway for future mathematics teachers.