California Invested Billions Into a New Grade for 4-Year-Olds Without Plan to Evaluate it

In 2021, Gov. Gavin Newsom and state lawmakers set out a plan to create the largest universal preschool program in the country for 4-year-olds, through a massive ramp-up of an elementary grade known as transitional kindergarten, or TK. At a news conference, Newsom called it “a commitment that all 4-year-olds will get h…