Time: Wasting it?

Wasting time should be considered as sin. So here i am sitting idle in a class of mine with no one around me. The thing is simple my opinion is the same as some of you, i hate to waste my time. And in particular i am talking about the classes, most of the time is being wasted here. I think that a person should take the task knowing his limits and his capabilities. If you are not capable of doing the task which is assigned to you, deny it at once because in that way the person might feel bad at fist but the huge amount of time that he was investing in you would be saved. 

                                              What i am recommending here is check the the listing, rating and achievement rates of any institute,school or collage before you put yourself into it. Do the research, don't trust blindly on anyone.