Gratz Prep Middle | Mastery Charter School

Your Neighborhood School in North Philadelphia

Welcome to Gratz Prep Middle! We’re a small neighborhood school in North Philadelphia serving 275 students in grades 7-8.

Our rigorous academics ensure students are fully prepared for high school and our sports & extracurricular programs allow students to lead and succeed outside of the classroom.

Students enjoy a strong sense of community and belonging in a safe environment, supported by caring and committed teachers.

At Prep Middle, we believe all of our students have greatness within. With love and high expectations, we help them find their own paths to success.

Stop by and visit us any time!







Our School

Our academically rigorous program prepares all students for success after graduation.

We offer:

  • Varied Courses
    • Range of courses from introductory to honors
    • STEM Honors Program
  • Special Education Programming
    • We provide comprehensive special education programming to meet the individualized needs of each child, including:
      • Individualized Education Plans
      • Academic Interventions
      • Low Incidence Programs  (Autistic Support, Multiple Disabilities, Life Skills)
      • Emotional Support
      • English as a Second Language (ESL)
      • Psychological and Social Services


Gratz Prep Middle students have tons of sports, clubs and extracurricular activities to choose from, including:

  • Student Government
  • Drum Line
  • Livewire Dance Crew
  • Photography and Film Club
  • Poetry Slam Team
  • Robotics Club
  • Yoga Club


  • The STEM Honors program offered at Prep Middle prepares students for college and the workforce through a rigorous program rooted in Science, Technology, Engineering and Math (STEM) skills and concepts.
  • Students learn critical and creative thinking skills, communication and collaboration and real-world problem-solving.
  • Students who are accepted to the program participate in various opportunities that accelerate their learning, such as engaging summer programs and STEM enrichment activities.

Learn more here.

Admission to Gratz Prep Middle School is first come, first served to students living in the Gratz High School attendance zone and students currently attending:  

  • Bethune 
  • Cleveland  
  • Clymer  
  • Duckrey  
  • Kenderton  
  • Steel  

Students from schools not listed above and outside the Gratz attendance zone may also apply for the lottery, however they can only enroll if seats are available.  

In the News

Three Mastery Schools Provide Hot Meals To Families On Martin Luther King Jr. Holiday Weekend

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Our Team

Jeffrey Glowik, Principal

[email protected]

Jeff Glowik has been the principal at Gratz Prep Middle since 2018. Prior to leading the school, he served as its founding assistant principal from 2013-2017. He also worked as a 9-12 grade history teacher at Victory Collegiate High School in Brooklyn, New York.

Mr. Glowik is a proud graduate of Temple University where he studied Political Science and History, and earned his Master’s of Science in Teaching at Pace University.

He loves spending time with his wife and daughter, is an avid music fan and collects Vinyl records from a wide range of musical genres including jazz, rock, soul and hip hop.


Zenobia Jones, Assistant Principal of Operations

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"There's a charter school called Mastery in Philadelphia. And in just two years, three of the schools that Mastery has taken over have seen reading and math levels nearly double - in some cases, triple...Now, if a school like Mastery can do it, every troubled school can do it."
-President Barack Obama