SAN ANTONIO Interested in enrolling your child in a public charter school? Harmony School of Innovation, a PreK through eighth grade public charter school campus, is teaming up with the United States Army to host its fourth Camp Inventions Connect outreach program. All the campers will be getting some really cool boxes in the mail with all of the materials they need to complete the week-long summer camp, said Angel Ximenes, an ESL gifted and talented coordinator. Theres no fee to attend and no qualification process at Harmony Public Schools charter schools. Harmony School of Innovation is part of Harmony Public Schools, a public charter school system of 58 campuses throughout Texas, and has been a leader in STEM since 2000.