In May 2008 , the DPS board renewed contracts with six charter schools for two years .
There have been significant calls for the Detroit Public Schools to cooperate more with charters , including renting unused schools to charters .
In May 2008 , the Detroit Public Schools board renewed contracts with six charter schools for two years .
There have been significant calls for the Detroit Public Schools to cooperate more with charters , including renting unused schools to charters .