Transitional kindergarten · San Lorenzo

4 of San Lorenzo’s public and charter campuses ran a TK class in 2025–26, enrolling 150 four-year-olds.

Source: CDE 2025–26 October enrollment count, 4 campuses in San Lorenzo.

Del Rey Elementary: 45 in TKHesperian Elementary: 45 in TKBay Elementary: 40 in TKGrant Elementary: 20 in TK
  1. Del Rey Elementary45 in TK
  2. Hesperian Elementary45 in TK
  3. Bay Elementary40 in TK
  4. Grant Elementary20 in TK
Each numbered dot is a campus with a TK class, where it stands in the city. A larger dot has more children in TK. North is up.

Eligibility

Who can start TK in 2027–28?

Children who turn 4 by September 1, 2027 can start, and it’s free.

Age

Is my child old enough?

A birthday from September 2, 2022 through September 1, 2023 (our arithmetic from the rule). A child who turns 5 by September 1 starts kindergarten instead.

Rule: California Education Code § 48000 (opens in a new tab)

Cost

Does TK cost anything?

No. TK is a free public school year before kindergarten, and enrolling is optional. Hours, before- and after-school care and open seats vary by campus, so ask the school.

Starting ages and cutoff dates →

Where to enroll

Through San Lorenzo Unified

Campuses

Which San Lorenzo campuses have a TK class?

4 campuses in San Lorenzo had a TK class in 2025–26.

Campuses by TK headcount

  • 45in TK

    Del Rey Elementary

    Grades TK–5 · San Lorenzo Unified

    Scope Score 72Developing · 28th percentile

  • 45in TK

    Hesperian Elementary

    Grades TK–5 · San Lorenzo Unified

    Scope Score 66Needs Support · 2nd percentile

  • 40in TK

    Bay Elementary

    Grades TK–5 · San Lorenzo Unified

    Scope Score 77Solid · 59th percentile

  • 20in TK

    Grant Elementary

    Grades TK–5 · San Lorenzo Unified

    Scope Score 71Developing · 25th percentile

Each campus’s TK headcount is from the state’s 2025–26 October enrollment count. Each Scope Score and percentile compares a school’s elementary grades with California elementary schools. A campus without elementary results shows none.

Each headcount counts the students enrolled on one October day, so it shows who enrolled, not seats open now. A campus missing here may still run TK; confirm with the school or district.

Before TK

Too young for TK? Where can my child go?

San Lorenzo has 19 licensed child care programs.

7

child care centers

12

family child care homes

A child born after September 1, 2023 isn’t old enough for TK in 2027–28. Until they are, look at San Lorenzo’s centers and family child care homes, and ask each one about ages and openings.

Preschools in San LorenzoPre-K vs TK vs preschool in California: a 2026 parent’s guide

Licensed programs from the California Community Care Licensing Division: child care centers as of August 13, 2026, family child care homes as of May 25, 2025. A license is not a quality rating or a current opening.