Children 2, 3 and 4 years old—especially boys and Black children—are being kicked out of their schools at “staggering rates,” she writes—more than three times that of K–12 school children.

In her excellent book, Who’s Raising the Kids: Big Tech, Big Business, and the Lives of Children, Dr. Susan Linn brings this insidious behemoth to the foreground and underscores it with bright red lines.