why did helen keller approach miss.sarah fuller ? what was the method of teaching adopt by sarah filler how did it become turning point in heller kellers education?

Miss Sarah was the one who would teach her how to speak . Miss Sarah way was simple that was she put helen's hand on her mouth and let her understand what she was saying by this helen felt those vibration and was able to capture the way miss sarah want her to teach..and that was the turning point in helen kellers education. By miss sarah and miss sullivain assistance helen day by day turn into a bright and outstanding student,