I see the issue, and my suggestion is to use “he,â€ “his name (Steven, instead of Mr. S),â€ and “this student.â€ Also, combine sentences whenever possible. For example:

 "Steven responds to noises and tracks the movements of the people in his classroom, but he still struggles when tracking objects. He can maintain good eye contact and expresses his joy when doing an activity or a discussion by smiling. This student has trouble concentrating for more than two minutes and is working on eye gazing at people, localizing objects, and communicating by using the AAC device. Steven expresses his likes and dislikes by his facial expressions."