Many of the accessibility techniques you use for people with visual disabilities are helpful for individuals with cognitive and motor disabilities, but putting extra attention on organization and clarity is definitely something you should prioritize.
This video explains the essentials for producing content that is accessible to students with cognitive and motor disabilities. There also is discussion on content for students with seizure disorders.
In addition to watching the video, please look through the Additional Resources. Then you will be ready for the following assessments.
A study revealed that simply presenting the same instructions in an easier to read font, caused students to see the tasks as easier. Clarity and organization make a difference.