For years, figuring out whether a Riverside child was old enough for transitional kindergarten (TK) meant checking a birthday against a cutoff that kept moving. As California phased in universal TK, the date shifted year to year, and many parents gave up tracking it.
That part is over. Heading into 2026-27, eligibility is consistent: a child who turns 4 by Sept. 1 can enroll in transitional kindergarten, full stop. "Now that the age requirement is stable year to year, Riverside families can plan their child's educational path with greater clarity and consistency," said Kristen Bristow, a teacher on special assignment in the elementary education office of Riverside Unified School District (RUSD).
And TK — free and full-day — turns out to be only the top rung of a ladder many families never see in full. In Riverside Unified, a child's path into public school can begin as early as 6 weeks old.
It can start at six weeks
The first step on this ladder is one not commonly associated with a school district: care for infants and toddlers. The Lincoln Early Impact Program, based at Abraham Lincoln High School at 4341 Victoria Ave., serves infants from 6 weeks to 18 months and toddlers from 18 months to 3 years — up to eight infants and eight toddlers at a time.
The program's reason for existing goes back to the 1990s, when it was built to help RUSD students who were themselves parents stay in school and finish their diplomas by removing one of the hardest obstacles they faced: finding trustworthy child care. It closed from 2011 to 2015, then came back after community members pushed to restore it. Its infant and toddler classrooms are fully licensed.
The program still prioritizes pregnant and parenting students, but it also serves other qualifying families in the community as capacity allows. Patricia Tran, coordinator of Riverside Unified's Early Childhood Programs, said the payoff shows up across generations. She recalled a mother who had gone through the program as a child returning years later to enroll her own grandchild; spotting a staff member, the woman "gave her a big hug and shared how much the program had meant to her family."
"Those moments remind us that we're doing more than preparing children for kindergarten," Tran said.
The middle rung: preschool
The next step up is preschool, for children roughly 33 months to 4 years old, offered in full- and part-day formats at 17 of the district's campuses — including a Spanish-language preschool at Mountain View Elementary. The programs are free for families who qualify on income, with a subsidized partial-payment option for families above the state's income ceilings. (Some of this preschool is delivered through the federal Head Start and California State Preschool programs, which the district runs alongside its own subsidized classrooms.)
One obstacle parents expect here often isn't real. "One thing many families don't realize is their child doesn't need to be toileting fully independently to enroll in our preschool programs," Tran said. "Our staff are experienced in supporting students through this stage of development, so it's not a barrier."
Tran points to a couple of markers for the district's preschool work: a 2020 Golden Bell Award from the California School Boards Association for what she describes as a child-centered approach, and top-tier ratings from Quality Start Riverside County across nearly all its preschool sites.
The top rung: a free grade for every 4-year-old
At the top sits transitional kindergarten. Any child who turns 4 by Sept. 1, 2026, is eligible for the 2026-27 year, and the program is free, full-day, and available at all 30 RUSD elementary schools — meaning a TK student goes to their neighborhood school and becomes part of its wider community from the start.
Getting to a seat at every school took years. "It meant close coordination between our facilities, human resources and instructional services teams to make sure every school was ready to welcome these students," Bristow said, describing a site-by-site build-out of classrooms and staffing.
Having that extra year in a school setting before kindergarten can make a meaningful difference, said Blossom Marshall, a TK teacher at Victoria Elementary School.
"TK is the gift of time," Marshall said. "Time for your child to build a strong foundation where they get used to playing and sharing with other children as well as adults. Time to learn how to go to school: play on the playground, eat in the cafeteria, be a friend, share — all through play-based learning, which, as research tells us, is the best way to learn."
Bristow argues the head start is measurable, pointing to a study by the American Institutes for Research that she said found children who attended TK outperformed their peers on early literacy and math skills entering kindergarten.
Preschool or TK?
With more than one option open to a 4-year-old, plenty of families land on the same question: which one? Tran knows there isn't a single right answer.
"Ultimately, the decision between preschool and Transitional Kindergarten comes down to parent choice, and our role is to make sure families understand the options available to them," she said. Preschool is a more self-contained early-childhood setting with part-day and full-day options; TK puts a child on a home-school campus alongside elementary school students of all ages. Families weighing the two are encouraged to think about their child's needs and learning style, and to call their home school or the Early Childhood Programs office, which can answer questions and, when possible, schedule a classroom visit.
RUSD is not the only early-education option in Riverside. Families can also apply for Head Start and Early Head Start through the Riverside County Office of Education, which runs the income-based programs for children from birth to 5; for the California State Preschool Program at licensed centers around the county; and for private preschools and licensed child care. What the district offers, Bristow said, is a free public path from preschool through TK to kindergarten, taught by credentialed teachers using a curriculum aligned to the state's Preschool/Transitional Kindergarten Learning Foundations.
How and when to enroll
Families new to RUSD can register year-round. If your child is eligible for Transitional Kindergarten or Kindergarten and you're new to the district, register here.For preschool and the Lincoln Early Impact Program, use the district's Hubbe Parent Portal; after families upload the required documents, the district typically follows up within about two weeks to set an appointment. Families who'd rather enroll in person can do it at their school of residence or get help at the district's Family Resource Center. The window for the following year, 2027-28, opens in spring 2027.
For the youngest programs, Tran's advice is simple: don't wait for a perfect moment. "We encourage families to apply as soon as they know they are interested," she said — the infant and toddler seats are the scarcest on the ladder.
More information: Riverside Unified School District is at 3380 14th St., Riverside, CA 92501, with offices open 7:30 a.m. to 4:30 p.m. For transitional kindergarten, register here or contact Kristen Bristow at 951-788-7135 or kbristow@riversideunified.org. For preschool and the Lincoln Early Impact Program, visit the Hubbe Parent Portal or call 951-352-8290. The district is on Instagram and Facebook at @RiversideUSD.
