Similarly, access to Head Start had no statistically measurable effect on nine of the 10 measures reported by parents and the two measures reported by teachers for the four-year-old cohort. [16] ...

Head Start is administered though the U.S. Department of Health and Human Services and “promotes school readiness for children in low-income families by offering educational, nutritional, health ...

All of this sounds reasonable enough. Head Start, staffed primarily by teachers who are poorly paid and not uniformly well-trained, has had an uneven record of quality since its inception in 1965.