The majority of information on this site is based on documents published by North Yorkshire County Council - available here:

Council Executive: Agenda, Minutes and Reports
Council Executive Decision Records
Full Council: Agenda, Minutes and Reports
Scrutiny Committees (Health and Young People):Agenda, Minutes and Reports
Schools Forum: Agenda, Minutes and Reports
Children's Trust Board: Agenda, Minutes and Reports
Open Data (Council spending over £500)

Further information here:

OFSTED North Yorkshire
The Department for Education SEN Statistics
Special Educational Needs and Disability Tribunal Quarterly Statistics (2011 onwards)
Special Educational Needs and Disability Tribunal Annual Reports (ceased 2010)