Q. What's your take on the U.S. preschool system?
A. First, let me clarify something: We really don't have a "system." What we have is a crazy quilt of early-childhood options, ranging from formal pre-kindergarten programs to nursery schools in church basements and mom-and-pop daycare centers that only the neighbors know about. There are excellent programs in each of these categories, but there are many more that aren't so good.