twitter rules

I watched a couple videos on teachers who use twitter in the class and it was surprising how the reports came back that more students participated in classroom discussions when using twitter. I plan on being a high school history/political science teacher and most teachers lecture. My daughter is a high school student and falls asleep in her history class constantly, but I think if she had twitter as a tool in this class she would enjoy it and actually get something out of it. I would totally use twitter in my class, the only hope I could get funding for laptops, but I saw that some students use texting on their cell phones. I will have to discuss the rules with phones used in school with the principle, but I am excited about twitter.