INDIANAPOLIS (AP) _ A teachers union wants proof from Indiana officials that problems with the online portion of the ISTEP+ exam won’t hurt teachers economically because their pay is linked to students’ success.
 
  Superintendent of Public Instruction Glenda Ritz ordered testing stopped Tuesday after some schools reported a second straight day of issues accessing the exam’s online portion. 
 
  The Indiana State Teachers Association wants the ISTEP+ issues fixed immediately. It says that under recent changes in state law, ISTEP no longer just tests student proficiency but now also drives school grades, individual teacher evaluations and teachers’ compensation.
 
  Former schools Superintendent Tony Bennett pushed for the changes in state law linking teacher pay to student performance. Ritz was a member of the teachers union when she defeated his re-election bid last November.