What about the law?
The Individuals with Disabilities Education Act (IDEA) is the federal law designed to insure that children with disabilities receive a free appropriate public education (FAPE).
State law (Wis. Stat. 115.797) requires mediation to be offered as an option in Wisconsin. DPI Information Update Bulletin No. 98.07 (now Bulletin No. 08.02) describes the mediation system in detail.