At the Council for Educational Diagnostic Services (CEDS) and the Louisiana Educational Diagnosticians’ Association (LEDA) Conference held on September 24 and 25, 2015, I participated in the one hour session “Avoiding Substantive Errors in IEP Development” presented by Mitchell L. Yell, Ph.D. He provided information on and the ramifications of several court cases in relation to the errors made in development and content of IEPs.