The top reported proficiency rate is 27% in English language arts. The lowest is 17% in Math.
Original Research by School Decision on Mastery Cs-hardy Williams
Mastery Charter School-Hardy Williams is a school-wide K-12 charter spanning about 1,190 students in southwest Philadelphia. It is part of the Mastery Charter network and serves a student population that is almost entirely Black and economically disadvantaged, with nearly all students qualifying for free or reduced-price meals.
The school's academic standing presents a clear area of concern. On the most recent state assessment, its math proficiency rate was quite low, with only about a portion of students in grades 3-8 meeting the proficiency standard. English language arts performance was similarly weak, below state expectations. A parent considering Hardy Williams should look into the school's plan to address these results and ask what specific supports are in place for struggling readers and math learners.
The school does operate as a regular public charter rather than a special-population or alternative setting, which means it is expected to meet standard academic benchmarks. No trend data was available to show whether performance is rising or falling, so you might ask directly whether results have improved since these recent assessments or what the school's trajectory looks like over time.
What sets Hardy Williams apart is a major career-pathway initiative launched in 2025. The Health Institute at Hardy, developed with Children's Hospital of Philadelphia and supported by a substantial philanthropic grant, offers a healthcare-focused curriculum for grades 7-12. Students can earn industry credentials such as Certified Medical Assistant and sterile technician certifications while still in high school, with a direct pathway to employment at CHOP upon graduation. This is a genuine post-secondary opportunity that preserves college options while creating a concrete alternative. For a student interested in healthcare, particularly one who may benefit from early workforce engagement, this program is a meaningful differentiator from most Philadelphia schools.
The school enrolls across a full K-12 band, with the student body fairly evenly distributed through middle grades and then concentrated in the high school years. Enrollment in the upper grades, particularly grades 8-9, is noticeably heavier than in earlier years, suggesting the school may be attracting or retaining older students. The location is in southwest Philadelphia, on Warrington Street in the 19143 ZIP code.
No graduation rate was reported, and no data on special education enrollment, English learner enrollment, or school discipline were available. The absence of a graduation rate is unusual for a high school and a parent should request this directly from the school. State testing results cover only grades 3-8, so performance in high school grades is not measured on these assessments. With the Health Institute curriculum now active at the high school level, understanding how the school supports students who do not pursue the healthcare track, and what college preparation looks like for them, would be worth exploring.
Housing costs in the 19143 area are modest compared to state and national benchmarks, with median home values well below state average, making it an affordable neighborhood. Rents have risen modestly year over year.
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