I am a teacher and normally I am the one in front of and explaining things or better show the students how they can learn and improve their skills. Now I am a student and I notice that sometimes it is not so clear as it seems to be for the teacher and I need time to go back and read it again. That is all right as long as you know it is normal, it happened to everybody - I am not stupid because I do not understand it suddenly. Another important fact is, that learning by doing is much better than