From the Educational Theater Association website:

The International Thespian Society is the only theatre honor society for middle and high school students in the United States. Affiliation brings credibility and distinction to students, theatre programs, and schools. It is a visible, positive symbol of the quality of your theatre program.

ITS recognizes, rewards, and encourages student achievement and celebrates the work of students in all aspects of theatre – performance and production. Each student is honored on a national level and gains access to opportunities and resources beyond those of their school.