Answer:
Teaching people to be more educated & respectful of disabled people. It's more prominent in our society for people to treat disabled people as inferior and use derogatory words. I think the best way to better improve this is to start by teaching children at a young age that it's okay to be different.
Here is something I found online that might help:
Promote Social Inclusion in Schools
Our overall cultural consciousness on how we treat and interact with disability needs to change, beginning in elementary schools. We need to celebrate our peers for their differences. If this is taught at a young age, less discrimination and more social inclusion will occur. Having kids with and without disabilities learning side-by-side helps everybody appreciate the talents and gifts all kids bring with them. As a society, we have the responsibility to promote the inclusion of our differences.