Parent input in individualized education program (IEP) development is the clear expectation in U.S. education law. Every IEP team must include parents, and their input must be equally considered when developing IEPs. The present study used content analysis of 88 IEPs of students with intellectual and developmental disabilities to explore team membership, concerns parents raised during IEP meetings, and evidence that parent concerns and priorities are reflected in IEP goals and supplementary aids and services. Findings reveal that although parents express a range of concerns and priorities, these are translated into goals or services only two thirds of the time. We provide implications of these findings for research and practice.