Group Project Experience

I have worked in group projects and had both good and bad experiences.
A good/successful group project was when everyone in the group participated, shared their ideas, and were prepared. That is, everyone knows what things have to be done and were motivated.
A bad/unsuccessful group project was when someone if not most of the group members did not participate, did not care to prepare themselves for the meetings and had no idea of what was going on. When someone is not interested, they would not want to do anything and make faces whenever are asked to do something. Another bad thing is that whenever we're in group discussing something, their full attention have to be present... that is, NOT texting or playing with his/her laptop, etc.