Dim-Dim is a wonderful way to interact with and instruct students on new skills or information. It is basically similar to a wimba classroom. It can be used to walk students through various lessons, draw pictures of concepts, share ideas and share computer screens. When having an entire classroom of students log on to the same website causes the system to come to a standstill, I'm speaking from experience, the ability to have them log into your meeting room works much better. One of the downsides of Dim-Dim is that the free account is limited to only 20 participants at a time. Generally I don't have this problem but on the rare occasion I do I simply have students buddy up on one computer. My computer has a camera built in but the computers at school do not so we can only have conversations but just like in wimba there are text capabilities both public and private. Ther are controls to lock the screen so if you don't want students drawing at times that's covered. You can also lock them out of a meetings if the need arises.
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