Some of my former students are on both Twitter and Facebook. So am I! It seems to be a matter of preference as to which they prefer. Twitter seems to be more conducive for the totally blind or braille readers using a screen reader. Facebook is more visual so those with some sight or with low vision prefer it. I don't know. What's your opinion?
I have started new Twitter account for Ms. Kathy's Kids at https://twitter.com/#!/MrsKathysKids. It's separate from my personal Twitter account.