Explorers Prep
Explorers Prep is a licensed child care center in San Francisco, CA, licensed for up to 32 children and serving children in more than one age group. It has held its California license since 2025. Since February 2021, state licensing staff have inspected it 1 time and investigated 2 complaints, 1 of them substantiated. The state issued 3 citations, 1 of them Type A (the most serious), most often for supervision (1 of 3). 3 citations came in the last 12 months, including 1 Type A. It has too few inspections so far for a statewide comparison.
Inspection record
Every state visit
What inspectors cited most
Citations, newest first
Based on records reviewed and interviews conducted, the center did not comply with the above-mentioned regulation. Staff failed to provide the required supervision when a child was left outside the facility unsupervised. This serious lapse in supervision poses/posed an immediate health, safety or personal rights risk to persons in care.
Based on records reviewed and interviews conducted, it was found that the center did not comply with its approved licensing playground waiver for McCoppin Square Park. The waiver requires that preschool children be escorted to and from the park by adult staff and that a ratio of one adult to every six preschool children be maintained during transit and while using the playground. On the date of the incident, two teachers escorted thirteen preschool children to the park, which did not meet the required one to six adult to child ratio. Failure to follow the approved waiver conditions poses/posed a potential health, safety or personal rights risk to persons in care.
Based on observation, the center did not comply with the cited section above. On July 7, 2026, at approximately 10:05 am, LPA observed a 9 month old infant napping in a crib with a blanket covering the infant's entire body up to the neck. This poses a potential health and safety risk to infants in care.
Complaint investigations
-Staff left daycare child outside of the facility unsupervised
About this center
Common questions
Has Explorers Prep had any serious violations?
California issued 1 Type A citation since 2021, its most serious category. The most recent was on Aug 5, 2026, for care and supervision. Each citation is listed in full above.
Have there been complaints about Explorers Prep?
California investigated 2 complaints since 2021 and substantiated 1. Allegations are shown only for substantiated complaints.
When was Explorers Prep last inspected?
Aug 11, 2026. No citations were issued during that visit.
How much does Explorers Prep cost?
California does not publish individual centers’ prices, so ask Explorers Prep for its current tuition. For comparison, the median full-time price at licensed centers in San Francisco County, which includes San Francisco, was $2,084 a month for infants (about $2,630 today), $1,735 a month for preschoolers (about $2,190 today) and $792 a month for school-age children (about $1,000 today) in the state’s 2021 Regional Market Rate Survey.
Who runs Explorers Prep?
The licensee is Explorers Prep LLC, and the administrator listed with the state is Claudine Castillo.
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Citations are quoted from California Department of Social Services inspection and complaint reports. Type A citations are the state’s most serious category (an immediate risk to children’s health, safety or personal rights); Type B citations are a potential risk. A citation is a finding about one rule, not a judgment about a center overall. Complaint allegations appear here only when the state substantiated them.
To read the full state reports, search facility number 384005050 on the California Care Facility Search. Data refreshed Oct 2, 2026.