Lead
Around the end of third grade, the question surfaces among parents: "Shouldn't we be thinking about cram school?" The major test-prep cram schools (juku) structure their curricula with a fourth-grade start in mind — so by this point in third grade, a sense of falling behind is easy to generate.
Does cram school actually improve outcomes? Which format suits which child? Does the starting age matter? These are questions that educational economics and developmental psychology have addressed directly, and the answers are more complicated than the enrollment calendars suggest.