A failing Savannah high school is firing its entire staff in an effort to avoid further sanctions from the state and to make the school eligible for up to $6 million in federal money, officials said Thursday.The 200 employees at Beach High School — including the principal — will work there through the end of the year but will not be rehired for that school, said Karla Redditte, spokeswoman for the Savannah-Chatham County school district.