Winchester's only K-12 college preparatory school.
ISW: Quick facts
ISW was named Best Private School by the Winchester Star Readers three times.
35 ISW Middle Schoolers won awards in the National Mythology Exam in the last 4 years.
ISW’s 2024-25 average elementary class size: 9.
Two-thirds of ISW faculty hold doctorates or masters degrees in their subject area.
ISW families enjoy a 10:1 student-to-college guidance-counselor ratio, compared with a 250:1 ratio in area high schools.
ISW students have won 11 Regional/State Science Fair awards in the last 7 years.
Meet the ISW community!
Our thriving community nurtures, supports, and challenges our engaged and curious students from kindergarten to twelfth grade. Nothing tells the ISW story like our students in action. Enjoy!
