---
title: 'High School Math Teacher - 9th-12th Grade - 2026/2027 School Year at Mastery Charter Schools'
canonical: 'https://feeny.ai/job/high-school-math-teacher-9th-12th-grade-2026-2027-school-year-mastery-charter-egbpegmw48pd'
type: 'job'
last_seen: '2026-09-12'
---

# High School Math Teacher - 9th-12th Grade - 2026/2027 School Year at Mastery Charter Schools

- **Company:** Mastery Charter Schools
- **Location:** Philadelphia, PA
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2025-12-01
- **Last confirmed live:** 2026-09-12
- **Apply:** https://jobs.lever.co/masterycharter/dfa3897c-3675-458a-8472-b28f87b3f735

## Job description

About Mastery:

Founded in 2001, Mastery Schools is a public charter network of 23 K-12 schools in Philadelphia and Camden, serving more than 14,000 students.

At Mastery, we’re on a mission to provide all students with the academic and personal skills they need to succeed after graduation and pursue their dreams. Student achievement is not just a goal for our organization; it's the reason we exist, and every member of our team is dedicated to securing student success. We are also committed to pursuing equity, actively disrupting systemic racism, and addressing the disparities that limit our students' choices.

Our culture is built on respect, service, and the belief that the success of our students, their families, and the communities we serve will help us achieve our mission. We foster a positive, open, and inclusive environment where honesty, humor, and continuous improvement are celebrated.

Join us in creating a model urban school district that serves all students with excellence. Together, we can make a lasting impact.

The Opportunity: We live in a world where math unlocks a future of possibilities. As a Math Teacher at Mastery you will work relentlessly to foster a love of math with your students while growing and developing in your craft.  From the moment they enter our buildings, young mathematicians at Mastery engage with Eureka Math Squared Curriculum to develop the skills and understanding necessary to have strong mathematical fluency. After Algebra I, Mastery’s students study Algebra I, Geometry and Algebra II, with opportunities for more advanced study in Precalculus, Calculus and Statistics.  Our core program for Algebra II, Geometry and Precalculus is Agile Mind. Teaching math at Mastery you will set high expectations and provide high support so that all of your students are able to succeed. You will work alongside our Specialized Services and School Culture teams to ensure your students receive the help they need to thrive. At Mastery we value Continuous Improvement and want you to learn and grow in your craft.  We utilize a team of Assistant Principals, central-office coaches, and school-based content teams to provide every teacher coaching and feedback. We have professional development or peer collaboration time built into our staff calendar. You will receive more than 250 hours of professional development annually and have a professional development allowance to use to further your growth.

Duties and Responsibilities:

- Drive student achievement and set high expectations for all students
- Commit to professional growth, self-reflection, a receptiveness to feedback, and a desire to continuously improve
- Implement rigorous and appropriate lesson plans, assignments, and assessments in cooperation with Mastery school-based leadership and curricular resources developed by Mastery’s central office Academic Team
- Work closely with school leaders to analyze student assessment data to measure progress and use data to inform instruction
- Collaborate in grade level teams to discuss student work, share best practices, plan events for joy and humor, and ensure student mastery of standards
- Engage families in their children’s education by building relationships and maintaining regular communication
- Demonstrate genuine interest, belief, and care for students’ personal and academic success
- Respond positively and effectively to challenges with a solutions-oriented resiliency

Education, Experience, and Skills:

- Bachelor’s degree required with a record of personal, professional, and/or academic achievement
- Teacher certification - completed or in process
- Demonstrated expertise in subject area
- Outstanding instructional skills driven by data and delivered through rigorous and engaging strategies

Physical Requirements:

- Ability to physically perform the essential duties of the role, and to work in the environmental conditions required, such as: traveling to network campuses; maneuvering in office spaces (including standing, walking, sitting for long periods of time, speaking loudly and clearly, seeing and hearing things both near and far away); stooping, kneeling, reaching file cabinets/shelves; fine finger and hand manipulation in use of computer, chalkboard, dry erase, &/or projectors; filing, faxing, scanning, coping, typing, mailing, and making phone calls; sitting for up to two (2) hours looking at a computer monitor, using a keyboard/mouse, and typing.

Salary and Bonus Information:

- This role is eligible for a $5,000 bonus as well as up to $5,000 for relocation expenses!
- New teachers start at $60,900, with Mastery offering up to $86,700 based on experience and education.
- Salaries range from $60,900 to $112,700, with growth opportunities as your career progresses.

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 for full-time employees), 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 access to the HealthAdvocate Helpdesk to help you navigate various benefits-related topics. Please go here to see all of our Benefits offerings!

Annual Calendar:

As you plan to make Mastery your new work home, please feel free to review our calendar here. We like to think our calendar is a benefit of working here too!

Why You Should Apply:

Studies have shown that women and people of color are less likely to apply for jobs unless they believe they can perform every job description task. We are most interested in finding the best candidate for the job, and that candidate may come from a less traditional background. Mastery may consider an equivalent combination of knowledge, skills, education, and experience to meet minimum qualifications. If you are interested in applying, we encourage you to think broadly about your background and skill set for the role.

## About Mastery Charter Schools

## Company Overview
- **One-liner**: Mastery Schools is a nonprofit network of charter, turnaround, and renaissance schools serving over 14,000 K-12 students in Philadelphia, PA, and Camden, NJ, focused on preparing students for postsecondary success.
- **Entity Type**: Private (Nonprofit)
- **Headquarters**: Philadelphia, Pennsylvania, United States
- **Founded**: 2001
- **Founders**: Not publicly available

## Core Business
- **Primary industry**: Education Administration Programs (K-12 education)
- **Target customers**: Students and families in underresourced communities, primarily students of color; B2C (direct student/parent) and B2G (operating public charter schools)
- **Mission**: “To ensure all students learn the academic and personal skills they need to be truly prepared for postsecondary success and able to pursue their dreams.” [masterycharter.org](https://masterycharter.org/education-career/teach-at-mastery/)

## Products & Services
- **Mastery Charter Schools / Mastery Schools of Camden**: A network of K-12 charter, turnaround, and renaissance schools. The organization also offers a **Mastery Teaching Residency** for aspiring educators and a **Principal Fellowship** for school leadership development. [masterycharter.org](https://masterycharter.org/education-career/teach-at-mastery/) | [jobs.lever.co](https://jobs.lever.co/masterycharter)

## Market Standing
- **Valuation / Market Cap**: Not applicable (nonprofit; not disclosed)
- **Key Metric**: Annual revenue of **$5.2M** (as of most recent data) and **705 employees** (+0.7% YoY). [linkedin.com](https://linkedin.com/company/masteryschools)
- **Notable Investors/Partners**: Not disclosed in available sources
- **Growth Signals**: 
  - Serves over **14,000 students** across multiple campuses in two states.
  - Headcount growth of **+0.7% YoY** (+8 employees).
  - Nationally recognized for turning around failing schools: test score gains of **40+ percentage points per grade/subject after three years**, violence reduced by **80%**, and student turnover dropped by **one-third**. [masterycharter.org](https://masterycharter.org/education-career/teach-at-mastery/)

## Competitive Advantages
- **Proven turnaround model**: Mastery is nationally recognized for dramatically improving student achievement and safety in previously low-performing schools.
- **Scalable operational system**: Interlocking management systems for talent, instruction, culture, and student support ensure consistency across the network.
- **Performance-based pay and development**: Competitive salaries ($60,900–$112,700) tied to performance, plus a nationally recognized coaching model for teachers and a principal pipeline program.

## Strategic Focus
- **Plan 2029**: A five-year strategic plan guiding the network’s direction, emphasizing academic excellence, equity, and expansion of impact.
- **Culturally Responsive Teaching (CRT)**: Prioritizing a student-centered approach within the “Ready for Rigor” framework.
- **Continuous improvement**: Investing in professional development, leadership pathways (Apprentice School Leader, Principal Fellowship), and talent acquisition for the 2026–2027 school year.

## Why Work Here
- **Mission-driven environment**: Staff are part of a joyful, collaborative community focused on educational equity and making a tangible difference in students’ lives.
- **Competitive compensation**: Teacher salaries start at **$60,900** and can reach **$112,700** based on experience and performance. [masterycharter.org](https://masterycharter.org/education-career/teach-at-mastery/)
- **Professional growth**: Access to best-in-class training, mentorship, and leadership development programs (Mastery Teaching Residency, Principal Fellowship).
- **Culture**: Emphasis on diversity, equity, and inclusion; staff are “welcomed, championed, and supported” in a collaborative environment.
- **Work location**: Schools in **Philadelphia, PA** and **Camden, NJ**; specific remote/hybrid policy not publicly stated (likely on-site given school setting).

## Sources
1. [masterycharter.org – Teach at Mastery](https://masterycharter.org/education-career/teach-at-mastery/)
2. [masterycharter.org – Lead at Mastery](https://masterycharter.org/education-career/lead-at-mastery/)
3. [masterycharter.org – Careers](https://masterycharter.org/careers/)
4. [linkedin.com – Mastery Schools Company Page](https://linkedin.com/company/masteryschools)
5. [jobs.lever.co – Mastery Charter Schools Jobs](https://jobs.lever.co/masterycharter)

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