The Exchange Visitor Program implements the federal Mutual Educational and Cultural Exchange Act of 1961. The Exchange Visitor Program — Teacher category promotes the interchange of U.S. and foreign teachers. The Department of Elementary and Secondary Education is one of many approved sponsors participating in this program and, like many sponsors, only sponsors exchange visitors from countries with which it has a Memorandum of Understanding (MOU). The Department currently has MOUs with the Spanish Ministry of Education, Culture, and Sport and the Camões, Instituto da Cooperação e da Língua, I.P. Through these partnerships, licensed teachers from Spain and Portugal who meet the eligibility criteria can come to the United States on a J visa and teach as a full-time teacher of record in a Massachusetts accredited public or private primary or secondary school (pre-K–12) for up to three years.
https://www.doe.mass.edu/licensure/exchange-visitor/