The Margaret MacMillan Trinity One Program



The Margaret MacMillan Trinity One program is now accepting applications for September 2019. Students can access the application here

We look forward to your application!


Since September 2018, Trinity One has added the Butterfield Environment & Sustainability Stream to the list of streams offered in the program. Click here to learn more about our newest stream!


The Margaret MacMillan Trinity One program at Trinity College in the University of Toronto provides first-year students with the opportunity to explore major issues and ideas pertaining to human life and world affairs, while in a small-group environment conducive to deep discussion and interaction.


  • Trinity One provides an academically rigorous preparation for the rest of your undergraduate career and is an excellent foundation for future upper level work.
  • Trinity One's interdisciplinary focus provides a firm grounding in, and connections to, a number of undergraduate programs. Students leave the program well positioned to thrive in a range of popular majors, minors, and specialists.
  • Trinity One includes co-curricular events that draw upon the rich resources of the University of Toronto's School of Public Policy and GovernanceCentre for EthicsMunk School of Global Affairs, Faculty of Medicine and University of Toronto affiliated hospitals. These events enable students in all Trinity One streams to hear guest speakers and to engage in informal conversation with one another and with their professors.
  • Trinity One is connected to a diverse, engaging, and motivating undergraduate college community.
  • Trinity One has a strong track record of producing alumni that go on to excel in both their academic and professional pursuits.


  • Trinity One has six streams: Policy, Philosophy, & EconomicsEthics, Society, & LawInternational Relationsthe Anne Steacy Biomedical Health Stream; the Butterfield Environment & Sustainability Streamthe Anne Steacy Medicine & Global Health Stream. Students enroll in one of these six streams.
  • Each stream consists of two credits. 
  • For Policy, Philosophy, & Economics; Ethics, Society, & Law; International Relations; the Butterfield Environment & Sustainability Stream; and the Anne Steacy Medicine & Global Health stream, the two seminar credits are both taken concurrently in the first year.
  • For the Anne Steacy Biomedical Health Stream, one seminar credit is taken in the first year, and the second seminar credit is taken in the second year. This gives students in life science the option to take math, chemistry, biology and physics in first year while taking part in Trinity One.
  • The seminar courses have limited enrollment to ensure small class sizes. They foster small-group discussion and emphasize the development of critical-thinking, oral-presentation, writing, and research skills.


For more news and a look at our past events, please visit our News and Program Events page.