Too often, people with disabilities are relegated to being passive when it comes to the arts.
The GMFCS can be a helpful tool in clinical and research use and has been shown to be stable and accurate over time. It can also help individuals and families better understand cerebral palsy.
I spent many years and many hours learning how to make the body work better, how to bring it out of pain. But that's not the human being alone.
Every educator needs to make a decision about technology they need to put in place. They're not sure if they should put Option A in place or Option B in place. This can be particularly difficult in the world of disabilities because there might not always be a perfect answer. Teachers can look to this solution, using the least dangerous assumption to make good decisions about what technology might be best.
When you don't have enough evidence about a student's performance, assume they can do whatever you're asking them to do.