Erin De Pree

Associate Professor of Physics

Department Chair

Erin De Pree


Dr. Erin De Pree joined the St. Mary's physics faculty in 2008. Since then Dr. De Pree has mentored nine research students in high energy phenomenology resulting in several conference presentations and one APS Apker finalist (Jeremy Perrin, 2013). Dr. De Pree teaches at all levels of the physics program: from a first-year seminar on black holes and dirty bombs to the third-semester intermediate physics course to the upper-level classical mechanics, a senior seminar on general relativity, and several independent studies (including a second semester of quantum mechanics and particle physics). Additionally, Dr. De Pree serves as the faculty advisor for Sigma Pi Sigma (the physics honor society). Recently Dr. De Pree was elected to the American Physical Society Mid-Atlantic Section executive board as a member-at-large. Dr. De Pree also organizes regular trips to national conferences for undergraduate students.

Areas of Research Specialization

  • High Energy Phenomenology
  • Physics Education

Areas of Teaching Specialization

  • Communicating Physics early
  • Extracting concepts from complex mathematics
  • All levels of physics


  • B.S. in Physics and Mathematics at Hillsdale College, 2003
  • M.S. in Physics at College of William & Mary, 2004
  • Ph.D. in Physics at College of William & Mary, 2008


  • De Pree Mentors Apker Finalist

    Dr. Erin De Pree mentored Jeremy Perrin (class of 2013) in his senior thesis on multiple extra dimensions. This work lead to Jeremy being named a finalist for the American Physics Society’s LeRoy Apker Award given each year to two students (one from a non-PhD granting institution and one from a PhD granting institutions). Up to five finalists are selected in each category and invited for an interview and to give a formal talk on their research. Past Apker winners come from schools such as Williams College, Haverford College, Harvey Mudd College, and Swathmore College.

    It is a tremendous honor for Dr. De Pree and Mr. Perrin's hard work and persistence to be recognized at such a prestigious level! In addition to celebrating Mr. Perrin's achievement with a honorarium and a certificate, the St. Mary’s College of Maryland Physics Department will also be honored with a prize and a certificate.


  • De Pree Elected to Regional Executive Committee of APS

    Dr. Erin De Pree has been elected to serve as a member-at-large on the executive committee for the Mid-Atlantic Section of the American Physical Society. The Mid-Atlantic Section represents physicists in the District of Columbia, Delaware, Maryland, New Jersey, Pennsylvania, and West Virginia.

  • Teaching Effectiveness

    Dr. Erin De Pree,Dr. Josh Grossman, along with Elizabeth Clune-Kneuer, Dr. Charles Adler, and Dr. Josh Grossman, presented "Student Evaluations of Teaching vs. Direct Assessment of Student Learning: A Case Study" at three conference in 2013. Their study examined the relationship between students' ratings of an instructor's effectiveness and direct measurement of what students learned. They found a statistically significant, but very weak, correlation between the two.