Schools · Mountainside

Mountainside, NJ schools

Mountainside’s public schools score well above New Jersey’s averages: 66% of students are proficient in reading against 47.3% statewide. Kids attend Beechwood School through grade 2, then Deerfield Elementary School.

Grades, test scores, graduation, spending and every school, from U.S. Department of Education data.

ASchool Grade #48Best schools in NJ (of 457)

TownTapestry School GradeNew

Mountainside’s School Grade: A

The public schools Mountainside’s kids attend outperform 91% of New Jersey’s districts on state tests. Among towns with similar incomes, they rank near the top.

ATest scores

New Jersey school districts we grade (645)Better than 91%

Lower resultsHigher results

New Jersey towns with similar household incomes (170)Better than 74%

Good confidence. Built on 449 tested students; ordinary year-to-year swings are unlikely to change the grade.

How the School Grade works

Results, not inputs. Math and reading proficiency on New Jersey’s state tests, each against the state average. Spending and class size are shown below but don’t count toward the grade. Tests: 2020–21; graduation: class of 2020.
The whole path. A town’s grade follows its kids: every district that serves it, weighted by the number of students tested in each.
Graded within the state. Each state writes its own tests, so districts are lined up against the rest of New Jersey only. A+ top 5%A next 10%A- next 10%B B+ to B−, next 30%C C+ to C−, next 30%D D and D−, bottom 15%
Individual schools are graded the same way on their own test results, against every public school in New Jersey with 25+ students. Private schools aren’t graded: they don’t take the state tests.
What a grade can’t tell you. Test results track family income closely, so a high grade partly reflects who lives in a town. That’s why we also compare towns with similar incomes. Visit, ask other parents, and read neighbor reviews. It’s our own summary of U.S. Department of Education data, not an official rating.