From the National Institute for Early Education Research (NIEER)
"The 2014 State Preschool Yearbook is the newest edition of our annual report profiling state-funded prekindergarten programs in the United States. This latest Yearbook presents data on state-funded prekindergarten during the 2013-2014 school year as well as documenting more than a decade of change since the first Yearbook collected data on the 2001-2002 school year. "