In March 2007, when he was sixteen years old, Kenneth R. Rosen was awakened in the middle of the night by two strangers who told him to get dressed and come with them. The men, hired by his parents, didn’t say where they were taking him, but his recent behavior — violent scuffles with teachers and police, drug and alcohol use, expulsion from school — was enough for him to guess. After being forced into a van, Rosen was taken to a “wilderness therapy” program in the Adirondack Mountains. He later went to a therapeutic boarding school in Massachusetts and a residential-treatment ranch in Utah. In all, he spent 288 days in the programs at a cost of tens of thousands of dollars.