According to the National Institute for Early Education Research, 18 states had at least 30 percent of 4-year-olds enrolled in state-funded preschool as of 2016. That compares to only two states in 2002. In the Midwest, Wisconsin and Iowa have the highest rates. (Nationally, only Florida and Oklahoma rank ahead of Wisconsin.)
The Wisconsin Constitution calls for schools to be “free and without charge for tuition to all children between the ages of 4 and 20 years,” and local districts receive state dollars for 4-year-old kindergarten via the K-12 funding formula (aid is equivalent to 0.5 or 0.6 dollars per child). Nearly all of Wisconsin’s school districts now provide voluntary, universal kindergarten to 4-year-olds.
Iowa also is among the nine U.S. states that provide districts with preschool dollars via their K-12 funding formulas, according to the Education Commission of the States. School districts in Iowa receive foundation aid based on their enrollment count for 4-year-olds (50 percent per child). The number of children served through Iowa’s preschool program has more than quadrupled since its inception in 2007, with about 98 percent of the state’s school districts now participating.