Academically, she explores the contemporary intellectual trends dominant in the various academic disciplines: the sciences, humanities, and social sciences. In 2014, she published Is Reality Secular? Testing the Assumptions of Four Global Worldviews (InterVarsity Press). In this book, Poplin examines four major worldviews—naturalism, humanism, pantheism, and Judeo-Christian theism—and explores their implications for human behavior and the evidence for their truth. She is a frequent speaker in Veritas Forums throughout the country.

Is Reality Secular? Testing the Assumptions of Four Global Worldviews. Downers Grove, Illinois: InterVarsity Press, 2014.

Finding Calcutta: What Mother Teresa Taught Me about Meaningful Work and Service.Downers Grove, Illinois: InterVarsity Press, 2008.

“A Radical Call to Service: The Five Tasks.” In Gladly Learn, Gladly Teach: Living Out One’s Calling in the Twenty-First Century Academy, edited by John M. Dunaway. Macon, Georgia: Mercer University Press, 2005.

Co-authored with John Riviera. “Merging Social Justice and Accountability: Educating Highly Qualified, Responsible and Effective Teachers.” Theory Into Practice 44, no. 1 (2005): 27–37.

Co-authored with Sharon M. Rogers. “Recollections