7–9), three traditional and three non-traditional high schools, and one K–12 online school. The school district also operates the Poudre Learning Center, a community resource focused on providing educational programming about the Cache la Poudre river. Many public schools offer one or more magnet programs, which enable students from around the district to attend public schools other than their assigned neighborhood school to participate in a unique educational program. Examples include Greeley West High School's International Baccalaureate and agriculture programs, Greeley Central High School's arts magnet program, and Northridge High School's science, technology, engineering and math (STEM) and horticulture programs. In addition to the school district's own schools, it also charters and oversees six charter schools: University Schools (K–12), Frontier Academy (K–12), West Ridge Academy (K–8), Salida del Sol (K–8, bilingual school), Union Colony Elementary School (K–5), Union Colony Preparatory School (6–12). The district also partially is affiliated with four "community partner" preschools, which are private preschools all or partially funded and overseen by the school district. Many of the district's charter high schools and non-traditional public high schools maintain a relationship with Aims Community College and/or the University of Northern Colorado to provide supplemental courses for high school students. There are at least five wholly private primary or secondary schools inside the Greeley city limits: St. Mary's Catholic School (P–7), Dayspring Christian School (P–12), Trinity Lutheran School (P–6), Adventure Child Care Center (P–6), and the Colorado Heritage Educational School System (K–12). Additionally, there are at least three private preschools: #1 Child Enrichment-Superior Childcare, Shepherd of the Hills Lutheran School, and ABC Central. In Colorado, private schools are considered businesses and are not regulated by the Colorado Department of Education or local school boards. In 2021, the Greeley-Evans school district reported 229 students who are home-schooled full-time; some number of these students may be affiliated with a private school for record-keeping purposes and some may attend public or charter schools for a few courses, making the exact number of home-schooled students in Greeley difficult to specify. Colleges and universities Greeley is also home to University of Northern Colorado, Aims Community College, Academy of Natural Therapy, and Institute of Business & Medical Careers. Sister cities Greeley is a sister city to Moriya, a city located in Japan's Ibaraki Prefecture. The cities host a collaborative student exchange program—on odd-numbered years the City of Greeley sponsors ten high-school students to visit Moriya for