Efforts by lawmakers to rescind automatic citizenship for children born in the United States to illegal immigrants are already stoking fears among many agricultural workers, and that has consequences for their children. Some parents, as they move with the crops, are already keeping their children out of school when they get to Arizona because they are worried about the bureaucracy and tougher restrictions in the state.

Despite the resilience of their young charges, educators at Sherwood face a catalog of need: 97 percent of students are near the poverty line, compared with 56 percent statewide. Seventy-seven percent have limited English, versus 32 percent throughout California. Only 6 percent of parents here attended college  the state average is 55 percent  and many are illiterate in their native language.

Though there has been progress, Sherwood hovers near the bottom of the state’s performance index, along with more than 100 California elementary schools with a similar demographic, many in the agricultural strongholds of the San Joaquin and Salinas Valleys.

Even as Latino enrollments grow, the number of new teachers earning bilingual credentials has fallen in the last decade to 1,147 per year from 1,829, according to the California Teacher Commission. The shortage of bilingual teachers is hurting Latino academic achievement, said Bruce Fuller, a professor of education and public policy at the University of California, Berkeley. Teachers like Mr. Ramos, “who have both language skills and the framework to respond to these kids’ cultural assets,” Professor Fuller said, are all too rare.