The Hawks: These are people who post a lot but, don't follow back.
The Crows: These people are social and like to engage in dialogue. These people follow back to keep the dialogue continuing.
The Owls: These people are quiet and usually don't follow too many people.
His over all suggestion is to follow educators, and follow back educators. Keep the sharing of best practices to help students get the most out their education.
He also has a few other suggestions:
1. Keep your username or Twitter handle professional.
2. Start following a core group of people who share your core values.
3. Join in discussions or at least follow discussions.
4. Think before your post. Don't post things will be negative or politically charged.