positive and negative effects of technology in the classroom..?

On the positive side, it opens up avenues of information that would normally have been difficult to access in the past, as well as present materials in a way which may benefit those whose learning styles differ from traditional teaching methods.

On the negative side, it has a tendency to make teachers lazy, as they are often quite happy to let the computer (or whatever else they might be using) teach the class for them. It also makes some instructors less dynamic than they could be, as they are often sitting down in one spot of the class working the controls instead of interacting with their students.