- Listing Type: Summer Programs
- Program Delivery: Residential, Online
- Provided By: College
- Session Start: July
- Session Length: Six Weeks, Four Weeks, Five Weeks
- Entering Grade: 9th, 10th, 11th, 12th
- Gender: Coed
- Category: Performing & Visual Arts
- Sub-Categories: Filmmaking and Digital Media, Debate, Acting
- Selective: Yes
- Ages: 15, 16, 17, 18
- Minimum Cost: > $3,000
- Career Clusters: Arts, Audio/Video Technology, and Communications
- Credit Awarded: No
NHSI has been the premier university-based summer program for outstanding high school students since 1931. The oldest and largest university-based program of its kind, NHSI offers studies in Theatre Arts, Film & Video, and Debate.
Students are affectionately known as "Cherubs," a name given to them in the 1930s by Northwestern Dean Ralph Dennis whose goal, "to bring together gifted young people and superior teachers in an atmosphere of affection, knowledge, and trust," is still upheld today.