The importance of sign language for Deaf students

make an annotated bibliography for 5 studies, researches, related to these questions:
Topic: The importance of sign language for Deaf students
1 – The importance of sign language in deaf life (children – students) in terms of:
a) Does using sign language impact on mental health and emotional growth (negative – positive)?
b) Does using sign language impact on academic achievement (High – Low)?
c) Does using sign language impact on social relations (negative – positive)?
2 – How far importance of mastering teachers and parents sign language?
3 – How far importance of bring a professional sign language interpreter in the classroom?
First step: Every study must be related to at least one question or more from above questions. I chose you because you did a good job for a similar work before. I will attach you the first annotated bibliography, which you did before.