Please read this information on 504 and Special Education:
https://www2.ed.gov/about/offices/list/ocr/transition.html
https://w3.lisd.org/section-504/links/
US Department of Education: http://www2.ed.gov/about/offices/list/ocr/504faq.html
Free Appropriate Public Education for Students With Disabilities (Requirements Under Section 504): http://www2.ed.gov/about/offices/list/ocr/docs/edlite-FAPE504.html
Wright's Law Discrimination. Section 504 and ADA, you can dig deeper, finding: FAQs, articles, about accommodations and modifications, case law involving disability discrimination, and free publications: http://www.wrightslaw.com/info/sec504.index.htm
With an eye to ADD and AD/HD. From CHADD’s National Resource Center on AD/HD: http://www.chadd.org/Understanding-ADHD/For-Parents-Caregivers/Education/Section-504.aspx
A parent’s guide to Section 504 in public schools. (From GreatSchools, with a focus on Section 504 for students with learning disabilities and/or AD/HD in public schools): http://www.greatschools.org/special-education/legal-rights/section-504.gs?content=868
Understanding the differences between IDEA and Section 504. (From LDonline): http://www.ldonline.org/article/6086
504 FAQ: http://specialchildren.about.com/od/504s/qt/504faq.htm
Sample 504 plans. Wondering what a 504 plan might look like? These templates and accommodation lists, put on the Web by school districts and disability organizations, can give you an idea of what to look at and look for when working with the school to put together a plan for your child: http://specialchildren.about.com/od/504s/qt/sample504.htm
https://www.collegechoice.net/college-resources-for-students-with-disabilities/
https://edubirdie.com/blog/resources-for-students-with-disabilities
https://educationusa.state.gov/resources-students-disabilities