What is the fine-grained topic of the following text: For three of Exeter’s four competing teams, participating in the inaugural high school track at this year’s Social Venture Innovation Challenge was the culminating project of a new senior elective called Social Innovation, a term-long course taught by Director of Service Learning Liz Reyes. Only return the topic.
The Exeter teams' participation in the Social Venture Innovation Challenge as a project for the Social Innovation course.