The children of migrant workers are some of the country’s poorest, most undereducated and hardest to track down. But tracking them down is exactly what a preschool for migrant children needs to do.

Families move with planting and harvest schedules, not the school year. In 2015, the U.S. Department of Education spent about $365 million to fund migrant education programs in 47 states so that children can pick up school again where ever their families land. NPR wondered what a day looks like for these children, so they asked if they could visit a clustered preschool center.