WBEZ brings you fact-based news and information. Sign up for our newsletters to stay up to date on the stories that matter.Two years ago, Chicago Public Schools started an elective mariachi program at seven elementary schools. It’s since become hugely popular, especially among Mexican American students and their families. Cesar Maldonado, President of the Mariachi Heritage Foundation, which funds the program, discusses the new All City Mariachi Ensemble. The program launches this year.