As soon as the lunch bell rings at his elementary school in Medford, Oregon, teacher David Cosand takes a few minutes to scan his mobile phone screen for messages that have accumulated throughout the morning in his Twitter account. In a few well-chosen words, the people Cosand follows via this free online service share their latest news, resources, questions, and (sometimes) trivia about education, technology, and related topics.
Cosand became a Twitterer about a year ago, and he now considers Twitter one of his best sources of real-time professional development. "I'm able to get information and find opportunities I wouldn't have been able to gather on my own," he says.
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