Check out mind mapping tools, like Simple Mind, to more easily plan and organize ideas prior to writing. They offer a free version/trial and also free information for how to effectively use mind mapping tools. www.simplemind.eu
Here are some simple strategies for using color-coding systems to help with organization, planning, and prioritization of tasks. https://www.understood.org/en/learning-thinking-differences/child-learning-disabilities/executive-functioning-issues/7-color-coding-tips-to-get-your-child-organized?view=slideview&utm_source=facebook&utm_medium=social&utm_campaign=understoodorg&fbclid=IwAR1WJDugMxMLeuvepG86v4dtPuN-i-59_vSXgaJpkafEoJSU5n3JdHObO2U
The Exact Instructions Challenge is a silly way to work on expressive language, thought organization, vocabulary, and sequential instructions. You could adapt this to include instructions for anything. Have fun with it! https://youtu.be/cDA3_5982h8
ADHD and Turning in Assignments Other ideas can include; using iPads to take pictures of assignments, using a Livescribe pen to record instructions/lectures, and emailing teachers assignments from home.