From 2001 through 2003, the University of Illinois at Chicago and Chicago Public Schools, supported by a FIPSE grant, collaborated in the Heritage Language Teacher Corps. The goal was to create a team of 100 high school Spanish teachers who were specialists in teaching heritage speakers.
This article (pdf attached at the bottom of this page) describes the model of in-service preparation offered during this grant through three university courses.
Illinois currently has 31 colleges/universities that license high school foreign language teachers. However, in 2018, only one regularly offered a course for teachers that prepares them to teach Spanish to heritage speakers. This is despite the large number of high schools that likely have enough Latino home Spanish-speakers to warrant a heritage program, visible on this map.
The hope is to create a state endorsement in heritage language teaching such that only qualified teachers will teach these classes.