This lets you know what the teacher is like and what is expected of you. This will let you know all the rules regarding absences, exams, etc. In fact, always try to be a little early, so you can get out all your stuff. During class, always have your calculator on your desk and have your text book out.
Teachers often do problems out of the book as examples.
Take very neat class notes. Put stars by problems or points that your teacher stresses or get excited about. If that isn't possible, always be sure to do the homework before you go to the next class. Form well-balanced study groups. A good study group consists of 4 or 5 students with a range of capabilities.