My child gets all As and Bs, can she still get IEP accommodations?

Yes.  Academic performance in and of itself is not enough to determine eligibility for services one way or another.  According to the U.S. Dept. of Education's Office of Civil Rights, "If the protections of §504 . . . are to have any meaning for a qualified handicapped person of superior intelligence, then the student must be entitled to implementation of a Section 504 Accommodation Plan which allows him to achieve educational success reasonably commensurate with his ability,"  (cf. 27 IDELR 858).

Thus, even if a child is receiving A or B grades in classes, but is having difficulty paying attention in class, with behavior at school, or at home with homework, the child may still be eligible for accommodations. The deciding factor will be to what extent learning disability impacts the student's ability to learn or behave in class.