Assignments are designed to do 2 things:
1) Test your knowledge on a subject.
2) Provide you with a resource or tool to take back to your work area.
When looking specifically at the second statement, it is important that you take into consideration what additional needs one of your target audience may potentially have. Your target audience are often your colleagues and you may not realise they have additional needs.
We are not asking you to be experts in additional needs. We are asking you to take a few basic steps to improve your resource or tool for the benefit of the whole target audience, not just the majority.