If something is on your mind, speak up and let him know.
You have to decide if it's important enough to speak up.
Engage yourself in class, speak up appropriately and take your studies seriously.
It is these people who cannot speak out because of the fear of the local godfathers who we must speak up for.
If you are having difficulty, speak up and let your instructor know so he or she will be able to help you with any challenges that you are having.