I think training is the responsibility of the students themselves were others. As if we did not attend despite not sick or have engaged absolutely necessary, we will not receive the documents distributed a professor. We need to ask for a copy from a friend, which makes it more time consuming. But when reading them we don’t understand because they are not enrolled the class. The professors teaching Instructors will explain the tricks makes students more understanding. If we do not understand, you can ask right away. If we ask a friend information may be wrong?