Constructivism is not simply a tool for research. It is also a vital element of critical pedagogy in an undergraduate International Relations classroom. Taking a constructivist approach to teaching is not about presenting only one perspective or making all of our students acolytes of Onuf, Wendt and Finnemore. Instead, tactical Constructivism in the classroom focuses on providing students with both a holistic introduction to International Relations and an opportunity for them to reflect deeply on why they believe what they believe about the world and its dynamics.