I share many sites with you, and I always say, "You need to check this out!" Well, Tom Daccord, history teacher at Noble and Greenough School  gets right to the point with help and specific ideas for integrating tech.
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Once section on using chats in the classroom gives a transcript as an example. Really helpful!!

Using Chatting and Instant Messaging in the Classroom

• Why Chat?
• Sample Assignment for a First In-Class Chat
• Sample Chatting Exercise
• Basic Guidelines for chat groups
• Staring Chat Rooms with Chatzy