Nearly half a million U.S. citizens are enrolled in Mexican schools. Many of them are struggling.

The L.A. Times reports:

Nearly half a million children who are U.S. citizens are enrolled in Mexican schools, according to the Mexican government. And there are at least another half a million Mexican-born young people who spent part of their life in the U.S. who have now returned home, according to estimates.

Most of the students educated in the U.S. and now living in Mexico are clustered in the northern border states, including Chihuahua and Baja California, said Monica Jacobo, a researcher at the Center for Research and Teaching in Economics. About half of elementary school-age children born in the U.S. arrive in Mexico without the necessary identity documents to enroll in school, she found, and many end up missing class or even entire grades while their parents scramble to obtain the paperwork.

Mexico has standards.