You can get a Twitter account for free online at http://twitter.com
Create the account using your district email account (you can always change your email address and/or username) with the intent that this will be your professional Twitter account.
Twitter enables 24/7 help and learning opportunities. You can use Twitter on your iPhone, Android phone, tablet or computer.
My favorite apps:
1) Twitter app. Works great.
2) Flipboard for reading Tweets with pictures.