INDIANAPOLIS (AP) _ Indiana’s A-F grading system for individual schools would be scrapped and implementation suspended on a national set of reading and math education standards under a bill approved by the state Senate.
 
  The bill approved on a 37-13 vote Wednesday now returns to the House, where some leaders are against forcing changes to the current A-F system and Common Core State Standards adopted by the State Board of Education.
 
  The Senate proposal would have the Department of Education issue two grades for each school. One would be based on the average academic performance of students, with the other based on how much students have improved.
 
  Sen. Dennis Kruse of Auburn says it is difficult to understand how the current single grade is determined and that the change would be an improvement.