Xavier Charter SchoolXavier Charter School is a public charter school in Twin [Falls, Idaho].HistoryXavier Charter School opened in 2007 offering kindergarten through eighth grade classes. A ninth grade class was added for the 2008–09 school year, and an eleventh grade was added for the 2009– 10 school year. and an additional grade will be added each year with the first high school class graduating in 2011. The school currently has grades K–12.