I recently had a student who was in a wheelchair taking my College Math course. As part of class, students are assigned questions and demonstrate answers on the board. I realized that John Doe was not participating as actively in the exercise. He was a very bright student that was an asset to the class. I talked to him privately to see how I could boost his confidence in coming to the board. He simply replied that he was only able to reach a very small part of the white board. From that point on, I verified that John Doe had a reserved spot on the board to participate as actively as other students. I also apologized for not recognizing the limitation earlier. Privately, I was so disappointed that missed such an issue.