 ISI is the only school in the Midwest where all of its upper school students participate in the full International Baccalaureate Diploma programme.Student groups and activities include the Aid to Congo Project, Habitat for Humanity, Literary Arts Society, Model United Nations, an Oxfam banquet, student government, the Timmy Foundation, the Gryphon Voices choir, art club, yearbook and sports.ISI has always been renowned for being one of the most diverse private high schools in the state of Indiana, with the Indiana Department of Education reporting the following ethnic breakdown for the 2019-2020 school year