The Incredible 5-point Scale: Assisting Children with ASDs in Understanding Social Interactions and Controlling Their Emotional Responses by Kari Dunn Buron & Mitzi Curtis. There is also a website: https://www.5pointscale.com

Use of a traffic light system may be helpful for some children/young people in understanding and working towards expressing and managing their emotions.  

The following book may also be helpful:

Why Do I Have To? A Book for Children Who Find Themselves Frustrated by Everyday Rules by Laurie Leventhal-Belfer, illustrated by Luisa Montaini-Klovdahl

For parents:

Helping Your Anxious Child: A Step-by-step Guide for Parents – 26 Jan 2009 by Ronald M. Rapee
Overcoming Your Child’s Fears and Worries by Cathy Creswell
https://girfec.fife.scot/__data/assets/pdf_file/0032/187484/PACE-School.pdf

For Young People:

The Anxiety Workbook For Teens: Activities to Help You Deal With Anxiety & Worry: (Teen Instant Help) Paperback – 29 May 2008 by Lisa. M. Schab

Starving the Anxiety Gremlin: A Cognitive Behavioural Therapy Workbook on Anxiety Management for Young People (Gremlin and Thief CBT Workbooks) Paperback – 28 Feb 2013 by Kate Collins-Donnelly

A 5 Is Against the Law! Social Boundaries: Straight Up! An honest guide for teens and young adults by Kari Dunn Buron intervention that identifies and explains how to handle different levels of anxiety, frustration, and anger.

SPELL approach:
https://www.autism.org.uk/what-we-do/professional-development/the-spell-framework

Widgit symbol software:
https://widgitonline.com/en/home

Trauma resources and training:
https://beaconhouse.org.uk/resources/

Self-help resource:

http://www.moodjuice.scot.nhs.uk/
www.anxietycanada.com

Websites:

www.anxietycanada.com
https://www.cci.health.wa.gov.au/
https://youngminds.org.uk/find-help/conditions/anxiety/
https://parents.actionforchildren.org.uk/behaviour/challenging-behaviour/managing-tween-anger/ https://childmind.org/article/angry-kids-dealing-with-explosive-behavior/