Hi, I've been playing piano for about 5 years. I progressed rather quickly at first and now really don't know what I'm doing. I want to excel; I want a future in music; I want to be able to play, but I'm not happy with ANYTHING I do. Hence the reason why I gave my self the above title. I want to try to get better, and I want to be able to play correctly, but I don't know where to begin. There are problems with my sound all over, but I don't know how to fix it. I can HEAR the problems, but I can't change them.
Anyway, my teacher recently gave me excercises 1 & 3 of Czerny's School of Velocity. Now, before I've always approached technique with the "quality over speed" philosophy, and do pretty well, but this is the school of velocity, so it seems as if I am expeced of both quality and speed. That is okay... until I look at the extraordinarily tremendous pace of the speed in which the book says I should take these excercises. Minim (half note) = 108?

? That means, playing 16th notes, 8 are crammed into one beat? That means approximately 15 notes per second? Whaaaaa?

Now, someone tell how they approached the Czerny School of Velocity. Is the tempo marking crazy or is 15 notes/second the goal I should have in mind for these exercises? If so, what am I doing wrong as far as muscles, tendons, elbow plavement, etc that I need to fix to play this better. Maybe someone could just critique me on how I want to play Excercise One.
Some at least answer the minim=108 question and maybe give me what he or she would view to be a more reasonable tempo. Thanks.