The full comparison

And it is not the same as a public, classroom or home library

Each kind of library does a different job, for different people, with different staff and funding. Here they are side by side.

CategorySchool LibraryPublic LibraryClassroom LibraryHome Library
Mission Empower students to be enthusiastic readers and learners, critical thinkers, skillful researchers, responsible digital citizens and ethical users and producers of information. Provide the tools and free access to support lifelong learning and engagement for all ages. Provide access to books and promote literacy within one class. Provide access to books and promote literacy within one household.
Who it serves Every enrolled student and staff member in the school. Some also serve students’ families. Any member of the public, of all ages and stages of life. Access restricted to one teacher’s class — roughly 15 to 25 students. The members of one household.
When students reach it During the school day, ideally before and after school too. No caregiver transportation needed. Daytime, evenings and weekends. Usually needs a caregiver with time and transportation. During school hours, at that teacher’s discretion. After school, weekends and summers — if the household has one.
Who staffs it A master’s-level Certified School Librarian: an educator trained in child and adolescent learning, instructional design, reading and literacy, with support staff. Provides continuity across a student’s time in that school. A master’s-level librarian serving as the library’s information professional, with non-degreed support staff. A degreed educator, with no School Librarian certification, usually for a single year. Caregivers, with no library training.
How it is funded General school budget — with no dedicated allocation in New Jersey. A separate, mandatory municipal library tax in New Jersey, first enacted in 1884. Individual teachers’ own money, grants and parent donations. The family’s own money.
Primary services Fostering a lifelong love of reading; information literacy and digital citizenship; lessons aligned to the curriculum; collaboration with teachers; makerspaces; a safe space with a social-emotional focus; read-alouds, book clubs and summer reading. Free access to all: materials for enrichment, learning and entertainment for all ages; community programming, outreach and partnerships. Access to materials supporting the curriculum for one small group; fostering a love of reading. Materials for entertainment; fostering a love of reading; sometimes curriculum support.
What the collection is for Collection professionally curated for each individual school: for the ages, reading abilities and interests of the enrolled students and for the curriculum. Skill building, next academic steps, college and career readiness. Print and digital, plus databases. Extensive, covering all ages and reading levels across wide topics and formats, focused on unhindered access for enjoyment and information. Collection is narrow and teacher dependent: one content area, specific ages and reading levels, often multiple copies of one title. Curated on interest and what the family can afford; may target a specific age or interest.