This 5-minute video from Human Rights Watch explains that educators for Deaf students can achieve a good education through sign language. It shares interviews with Deaf children in Kenya and their educators. The video uses a mix of English (with English captions), Kenyan Sign Language, and International Sign.
Also read an article that explains more about the video and why sign language is important for Deaf students. The article is partly accessible, but with some difficulty for people using screen reading software.