In general, when people lie to me, I get better results from confusion than anger. If you say, "Really? When I talked to his teacher on Monday, she said she was waiting for you on the IDEP. Could you please circle back with her, just to be sure that she's not waiting for you to do something while you're waiting for her to do something?"

Then do call the central office and confirm that she scores have actually been submitted online. If they haven't, email her, and tell her, "The central office still doesn't have his scores, but I know that you told me you submitted them. Could you please double check with them and make sure they went through? I know these electronic systems can be really confusing."