PSSA + Keystone, SY 2024-25
All grades, all students. % Proficient or Advanced.English Language Arts / Literature
31.7%
State avg 51.1%
District avg 19.0%
County avg 47.9%
-18.3pp since 2023-24
Mathematics / Algebra I
13.1%
State avg 43.0%
District avg 14.4%
County avg 40.3%
-6.1pp since 2023-24
Science / Biology
11.3%
State avg 50.6%
District avg 12.9%
County avg 43.4%
-12.2pp since 2023-24
What this means: On the PSSA + Keystone, Pennsylvania's statewide test, about 32 of every 100 students at this school read and write at grade level, about 13 of 100 do math at grade level, and about 11 of 100 are at grade level in science. Across all Pennsylvania schools, those numbers are about 51, 43, and 51. Reading and writing scores are down about 18 points since 2023, while math scores are down about 6 points and science scores are down about 12 points.
What is PSSA + Keystone?
PSSA + Keystone is the statewide standardized test administered by Pennsylvania public schools.
What does "% Proficient or Advanced" mean?
It is the share of students at the school who performed at grade level or above on the test, summed across the top two of four performance levels. A higher number is better.
What does 31.7% mean for English Language Arts / Literature at Louis E Dieruff HS?
It means about 31.7 percent of students tested at Louis E Dieruff HS performed at grade level or above on the PSSA + Keystone English Language Arts / Literature test in 2024-25. The statewide average for Pennsylvania that year was 51.1%. The other students fell into the lower performance levels.
How is the state average calculated?
It is a weighted average, not a simple average of each school's number. We multiply each public school's score by how many of its students tested, add those together for all schools in Pennsylvania, and divide by the total students tested that year. This way a big school with 1,500 students counts more than a small school with 50 students, which is the right way to ask "how did the typical student do this year?". District and county averages on this page use the same method, just scoped to that district or county.
Where does this data come from?
Pennsylvania Department of Education, Pennsylvania System of School Assessment (PSSA) for grades 3-8 and Keystone Exams (Literature, Algebra I, Biology) at the high-school level. School-level All Students subgroup, "Percent Proficient and above" column from the PDE school-level data downloads. Top 2 of 4 PA performance levels (Proficient + Advanced).
How often is it updated?
PSSA + Keystone is administered once a year (spring). Results are released by the state in the summer or early fall. We refresh this page after each annual release.
