Child in bright shirt

Early Childhood

Toddler through Grade 4

Middle School

Grades 5 through 8

Upper School

Grades 9 through Post Graduate

Sem Facts

  • 22%international population, including 30 countries
  • 820students at both campuses
  • 85%of students admitted to the top three tiers of colleges in the last five years
  • 1The only school in the Commonwealth with Round Square Global Membership that participates in exchanges and international conferences
  • 21Advanced Placement Courses offered
  • 5Continents represented
  • 14,000Service hours completed by students in 2017-18
  • $16.3 millionstate-of-the-art performing arts center hosts world-renowned artists
  • 2outdoor classrooms
  • 28%of the Class of 2020 will play an NCAA sport

Living At Sem


Our student body is a microcosm of the national and global community with 35 countries, 18 states and five continents represented. Our campus is just two hours from Philadelphia and New York City and the Sem residential life and student activities departments often offer trips. Locally, there is plenty to do in Northeastern Pennsylvania, from outdoor activities to nearby shops and restaurants.

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Sem Stories

Aaron Richterman - Class of 2005

In February 2020, when DR. AARON RICHTERMAN ’05 was conducting research on HIV and tuberculosis in Haiti, a new virus was spreading rapidly across China. Richterman, an HIV Clinical Fellow at Brigham & Women’s Hospital/Harvard Medical School in Boston, Mass. at the time, soon returned to Boston and quickly found himself on the front lines of the fight against COVID-19.

Read More about Aaron Richterman - Class of 2005
John Platt and his runners

John Platt is a runner. He runs in 5K races, half marathons, 5 milers and other races, and has run all over the world, from Saudi Arabia to the Great Wall of China. In 2019 he ran in at least 12 events, including the Houston Half Marathon and the Bethlehem Runner’s World Half Marathon

Read More about John Platt - Class of 1949
Janine Musheno - Class of 2007

According to a recent study released by the National Center for Health Statistics, the rate of dental cavities in children ages 2-19 years old has dropped from 50 percent in 2011-12 to 43 percent in 2015-16. DR. JANINE MUSHENO DMD ’07, a dentist with the Stephen Klein Wellness Center in Northcentral Philadelphia, works every day to help bring that rate down even more.

Read More about Janine Musheno - Class of 2007