Serving 392 students in grades Kindergarten-4, Hartshorn School ranks in the top 5% of all schools in New Jersey for overall test scores (math proficiency is top 5%, and reading proficiency is top 5%).
The percentage of students achieving proficiency in math is 80-84% (which is higher than the New Jersey state average of 38%). The percentage of students achieving proficiency in reading/language arts is 80-84% (which is higher than the New Jersey state average of 49%).
The student-teacher ratio of 11:1 is equal to the New Jersey state level of 11:1.
Minority enrollment is 62% of the student body (majority Asian), which is lower than the New Jersey state average of 63% (majority Hispanic and Black).
Quick Facts (2026)
- Grades: Kindergarten-4
- Enrollment: 392 students
- Student-Teacher Ratio: 11:1
- Minority Enrollment: 62%
- Overall Testing Rank: Top 5% in NJ
- Math Proficiency: 80-84% (Top 5%)
- Reading Proficiency: 80-84% (Top 5%)
- Source: National Center for Education Statistics (NCES), NJ Dept. of Education
Top Rankings
Hartshorn School ranks among the top 20% of public schools in New Jersey for:
Category
Attribute
Overall Rank
Math Proficiency
Reading/Language Arts Proficiency
School Overview
Hartshorn School's student population of 392 students has stayed relatively flat over five school years.
The teacher population of 35 teachers has stayed relatively flat over five school years.
Grades Offered
Grades Kindergarten-4
(No virtual instruction)
(No virtual instruction)
Total Students
392 students
Total Classroom Teachers
35 teachers
Last Day of School
Sat. Jun 20, 2026
School Rankings
Hartshorn School ranks within the top 5% of all 2,184 schools in New Jersey (based off of combined math and reading proficiency testing data).
The diversity score of Hartshorn School is 0.62, which is less than the diversity score at state average of 0.72. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#54 out of 2184 schools
(Top 5%)
(Top 5%)
Math Test Scores (% Proficient)
80-84%
38%
Reading/Language Arts Test Scores (% Proficient)
80-84%
49%
Student-Teacher Ratio
11:1
11:1
American Indian
n/a
n/a
Asian
48%
11%
Hispanic
3%
35%
Black
2%
14%
White
38%
37%
Hawaiian
n/a
n/a
Two or more races
9%
3%
All Ethnic Groups
Eligible for Free Lunch
1%
38%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), NJ Dept. of Education
Frequently Asked Questions
What is Hartshorn School's ranking?
Hartshorn School is ranked #54 out of 2,184 schools, which ranks it among the top 5% of public schools in New Jersey.
What schools are Hartshorn School often compared to?
Hartshorn Schoolis often viewed alongside schools like Glenwood School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
80-84% of students have achieved math proficiency (compared to the 38% NJ state average), while 80-84% of students have achieved reading proficiency (compared to the 49% NJ state average).
How many students attend Hartshorn School?
392 students attend Hartshorn School.
What is the racial composition of the student body?
48% of Hartshorn School students are Asian, 38% of students are White, 9% of students are Two or more races, 3% of students are Hispanic, and 2% of students are Black.
What is the student-teacher ratio of Hartshorn School?
Hartshorn School has a student ration of 11:1, which is equal to the New Jersey state average of 11:1.
What grades does Hartshorn School offer ?
Hartshorn School offers enrollment in grades Kindergarten-4 (No virtual instruction).
What school district is Hartshorn School part of?
Hartshorn School is part of Millburn Township School District.
School Reviews
Review Hartshorn School. Reviews should be a few sentences in length. Please include any comments on:
- Quality of academic programs, teachers, and facilities
- Availability of music, art, sports and other extracurricular activities
Recent Articles
AI Report Cards: Should Schools Evaluate AI Use?
Explore whether schools should assess student AI use, the benefits, risks, and what responsible AI report cards could look like in 2026.
The Parent’s Guide to School Cell Phone Bans in 2026
Learn how school cell phone bans work in 2026, why districts are adopting them, and what parents should expect.
Parental Involvement in Public Schools: 2026 Update
Explore the latest 2026 trends, research, and strategies shaping parental involvement in public schools and student success.
