CADRE (The Center for Appropriate Dispute Resolution in Special Education) has put together resources to help parents and school districts prevent and resolve disputes.
Here are some specific helpful resources:
Quick Guide to Dispute Resolution
From CADRE, a 2-page summary
Browse resources that are organized by stage of conflict, and level of intervention.
Working Together Online Learning Series
Five interactive self-directed courses that provide families and educators with a number of strategies for working together and through conflict.
IDEA Dispute Resolution Parent Guides
Printable guides in multiple languages.