Grading with IEP's

I feel like the best way to go about grading students with IEP's is to set up a system to grade them according to the goals of their IEP's. Since accomodations are being made to help that student to come closer to reaching the A standard, making grad accommodations should happen too. They should be able to see the progress toward reaching their personal learning target.  They will be more motivated.  If they see how far behind they really are they may get discouraged and not see how much they are improving.