Sign-Language=Writing and Reading?

We don't often mention signing in this forum. Why not? Christine Sun Kim provides an excellent example of another way to read and write English, with a grammar structure that is rich with emotion. Take a look at The enchanting music of sign language clip. What do you think? I wonder if learning how to sign would open doors among our students, especially those who face major challenges expressing themselves in our academic ways. Hmmmmmm.... Leecy