Mastery CS-Hardy Williams

Mastery CS-Hardy Williams is one of the low-enrollment multi-level schools in Philadelphia, Pennsylvania, operated by Mastery CS-Hardy Williams, with 1,253 students on its rolls from grades K through 12. By comparison, Pennsylvania's public schools average about 1,819 students each, so Mastery CS-Hardy Williams sits 31% leaner than that benchmark.

Mastery CS-Hardy Williams is the operating authority for Mastery CS-Hardy Williams, handling staffing, calendars, and reporting to the state department of education.

Demographically, Mastery CS-Hardy Williams lists that 95% of students identify as Black, making the school strongly Black-majority. Other groups include 3% Hispanic. The wider county runs roughly 39% Black, putting the school's mix considerably more Black than the area baseline.

On the resource side, Staff filings list 66 full-time-equivalent teachers, which works out to roughly 18.9:1 students per teacher. The state averages around 15.5:1, so this campus is higher than the state norm typical. Roughly 95% of students at Mastery CS-Hardy Williams qualify for free or reduced-price lunch, often used as a Title I proxy.

After controlling for student poverty, Mastery CS-Hardy Williams tracks the demographic baseline. The model predicts 36.9% given the school's FRL share; actual proficiency is 25.3%.

Across the wider county, Philadelphia County reports that median household income runs about $61,953, roughly 35% of adults have completed at least a four-year degree, and roughly 17% of residents live below the federal poverty line. Mastery CS-Hardy Williams is one of 309 public schools in Philadelphia County (combined enrollment of about 182,005 students).

The closest other public school is Independence CS West, roughly 0.3 miles away. Within five miles, there are 8 other public schools. On composite proficiency, Mastery CS-Hardy Williams comes 2nd of 7 in the immediate cluster, ahead of the nearby-schools average of 16.6%.

The campus sits in a metropolitan setting. Mastery CS-Hardy Williams is a charter school, which puts it inside the public-school system but outside the standard district-managed model.

Looking at the recent track record. Over the past 7-year window, the student count held roughly steady: 1,229 students in 2018 compared to 1,253 in 2025.

On this page, recent activity here tends to focus on classroom updates, athletics, and weather closures. Members of the school community can share what they know.