Check this site out https://www.drsrigada.co.uk/top-10-strategies-to-manage-behaviour-problems-in-children-with-autism-and-adhd/
For EHCP referrals you will need to collate the evidence that proves child x is not able to cope in school without the strategies embedded in place.
Assess plan do review – at 6 week intervals.
Contact the SEND ADVISORY TEACHER to support you and collate short observations in different settings or during specific sessions. Keep them short and to the point.
ABC chart for behaviour monitoring and behaviour support plan is great.