The justices reasoned that busing was warranted because the district had deliberately and knowingly taken steps to prevent integration of their public schools. During the 1970s, court orders supporting busing were handed down all over the United States. When those decisions were appealed to the U.S. Supreme Court, the Court often upheld the argument to use busing to eliminate segregation. Successful and high-quality charter schools may go on to replicate or expand. CSP grants are available for charter operators that are interested in different types of replication or expansion. For example, a CMO may apply for CSP grants in order to expand the grade levels it serves, increase the number of seats available for students, or replicate its model into another school.