IMMEDIATE - Building Substitute Teacher (Part-Time) - 2022/2023 School Year

Philadelphia, PA /
Network Support – Substitute Teaching Services /
Part-Time Immediate
/ On-site
About Mastery:
We believe educational inequity is the most pressing social problem facing our country and the civil rights issue of our day. Mastery exists to help solve this problem. Our ultimate goal is to create a model urban school district that serves all students with excellence. We are organized around one driving mission: All students learn the academic and personal skills they need to be truly prepared for postsecondary success and able to pursue their dreams. To fulfill this mission, we attend to the whole child – academically and emotionally – matching high expectations for students with high levels of support.
Mastery Charter Schools is a nonprofit network of more than 24 schools serving over 14,500 students in Philadelphia and Camden.   We are the largest turnaround school operator in the nation and have been lauded by President Obama and the US Department of Education for our ability to dramatically boost academic achievement in historically low-performing schools.
We know neighborhood schools matter, all students deserve access to a great education, and the people in our buildings can grow and develop sustainably to make the biggest impact possible in this work.
Mastery's Equity Vision:

We believe that diversity, equity, and inclusion are essential to achieving our mission.

We strive to be an anti-racist school district that eliminates the inequities in academic achievement that limit our students’ choices; that cultivates classrooms where every student is affirmed, supported, and held to high expectations; and that nurtures a diverse organization where students, staff, and families are valued, respected, and included.

This role is eligible for a $500 signing bonus!

Position Summary:
Mastery Charter Schools is seeking part-time elementary (K-6) onsite substitute teachers for our urban school turn-around efforts.  This position will require instructors to work 4-5 days a week up to 29 hours.  Because you will be on site, you will be part of a one team effort to help our young scholars succeed.  Substitute teachers will be responsible for implementing Mastery’s curriculum and utilizing classroom routines and procedures with consistency.  During extended absences substitute teachers will also be responsible for developing lesson plans, homework assignments and assessments.  Substitute Teachers will collaborate in grade level teams to discuss student work, share best practices, and ensure student mastery of standards.  Substitute teachers will be expected to form and maintain relationships with students’ families, including phone calls and conferences, and will be invited to participate in on-going professional development in the spirit of continuous improvement.  Mastery is looking for instructors committed to teamwork and high expectations for all students. The ideal candidate will have classroom teaching experience, preferably within an urban school setting.


    • Bachelor’s Degree
    • Must be able to work collaboratively in a high-stakes environment
    • Outstanding instructional skills, including the ability to motivate and challenge students and maintain an orderly classroom environment
    • Demonstrated expertise in the subject of instruction
    • A strong sense of personal accountability for student achievement
    • A belief that all students should be held to high academic standards
    • The ability to communicate effectively with parents
    • Demonstrated professionalism, responsibility, and a strong work ethic
    • A positive attitude and a drive for personal excellence
    • The ability to problem-solve
Mastery's Benefits Package:

We offer a full benefits program and opportunities for professional growth. Some of our most popular benefits include our 403(b) retirement plan for PA employees (with a 5% match from Mastery), enrollment in the State of New Jersey Pension Plan for NJ employees, a robust Employee Assistance Program, mental health and counseling programs, an annual Professional Development Fund, and discounts and perks at a myriad of retailers, travel organizations, insurance providers, and so much more, as well as a Benefits VIP Helpdesk to help you navigate various benefits-related topics!

Please go here to see all of our Benefits offerings!

Mastery's Annual Calendar:

As you plan to make Mastery your new work home, please feel free to review our PA Academic Calendar for SY 22/23 and our NJ Academic Calendar for SY 22/23. We like to think our calendar is a benefit of working here too!

Mastery Charter Schools is an equal opportunity employer and actively encourages applications from people of all backgrounds. Compensation is competitive and commensurate with experience.

UPDATE AS OF January 2023 - Please review Mastery’s Health and Safety Plans here to learn about our approach to vaccination and testing as well as our response to COVID-19. For ongoing positions, Mastery roles are designated as in-person, with regular on-site responsibilities, unless otherwise noted.  As such, Employees must be able to support Mastery Schools’ academic plan and business strategies on-site – at a Mastery campus - as required.  

Exceptions to this requirement will be considered on an individualized basis.