TK vs preschool vs kindergarten
They line up by age: preschool comes first, then Transitional Kindergarten (TK) as a bridge year, then kindergarten. Here's how the three differ in age, cost, and focus.
At a glance
| Preschool | Transitional Kindergarten | Kindergarten | |
|---|---|---|---|
| Typical age | 3–4 years | 4–5 (just before the K cutoff) | 5–6 years |
| Cost | Usually paid; some free public pre-K | Free (public school) | Free (public school) |
| Run by | Private centers, churches, some districts | Public school districts | Public school districts |
| Main focus | Play-based social & early skills | Bridge year: play + early academics, K-readiness | Formal academics begin |
| Required? | No | No — optional, where offered | Often required (age varies by state) |
| Where it exists | Everywhere | Mainly California; a few states have similar programs | Every state |
Preschool vs TK
Preschool is the broad term for early-childhood programs serving 3- and 4-year-olds. Most are private and tuition- based, run by centers or churches, and focus on play, social skills, and early literacy and numeracy.
Transitional Kindergarten is more specific: a free public-school grade for children who just miss the kindergarten age cutoff. It keeps the play-based feel of preschool but adds more structured, kindergarten-aligned learning — a true bridge year.
TK vs kindergarten
Both TK and kindergarten are free and run by public school districts, but they serve different ages and move at different speeds. TK is for children not yet old enough for kindergarten and leans on play with a gentler academic pace. Kindergarten is where formal academics begin, with a full school-day schedule.
Whether your child does TK or heads straight to kindergarten comes down to their birthday and your state's cutoff date.
How to choose
- Turns 5 on or before your state's cutoff? Your child is eligible for kindergarten.
- Turns 5 just after the cutoff? TK (where offered) or another pre-K year is the usual path.
- Age 3–4 and not near the cutoff? Preschool is the fit — look at cost, schedule, and free options.
TK as a distinct grade is mainly a California program; a few states run similar transitional or "young 5s" classes. Check your state's specifics.
Frequently asked questions
- What is the difference between TK and preschool?
- Preschool is usually private and play-based for 3- and 4-year-olds. Transitional Kindergarten (TK) is a free public-school grade for children who just miss the kindergarten cutoff — it blends play with early academics to get them ready for kindergarten.
- What is the difference between TK and kindergarten?
- TK is the year before kindergarten for children who are not quite old enough for it. It moves at a gentler pace with more play, while kindergarten begins formal academics. Both are free and run by public school districts.
- Is TK the same as pre-K?
- "Pre-K" usually means the year of preschool before kindergarten (age 4). TK is a specific free public grade, mostly in California, for children who turn 5 just after the cutoff. They overlap in age but are not the same thing.
- Should my child do TK or kindergarten?
- It depends on your state's cutoff and your child's birthday. A child who turns 5 on or before the cutoff can start kindergarten; one who turns 5 just after usually does TK or another pre-K year first.