Twitter is one of the most popular websites on the internet with over 1 billion Tweets (Twitter posts) per week. There are over 450,000 new accounts created everyday and that number continues to grow daily. With almost everyone using Twitter, how can teachers and professors find ways to engage a more tech-obsessed generation with this micro-blog tool? Here are three tutorials that help the beginner create an account, learn some Twitter language, and provide some options for implementing Twitter inside and outside the classroom.

How to Login/Signup
Twitter: How to Login or Signup

What are Hashtags and How to Create Them
Twitter: Hashtags and How to Create One

How to Use Twitter Inside and Outside School
Twitter: Using it in the Classroom

The video below is an example of one school using Twitter in the classroom to engage lage groups of students. It's called the "The Twitter Experiment".

Here is a review about Twitter written on Scribd that may help you understand a little bit better what Twitter is and how it stacks up.
Twitter Review