
    Collingdale School District Appeal.
    Argued September 22, 1970.
    
      Joseph A. Damico, Jr., with him Fronefield, deFuria and Petrikin, for appellant;
    
      Donald M. McCurdy, with him Philip B. Driver, Jr., and Fox and McCurdy, for Interboro Joint School System, intervening appellee;
    
      Patrick H. Washington, Deputy Attorney General, with him Fred Speaker, Attorney General, for State Board of Education, appellee.
   Judgment affirmed.  