1) I learn a lot about organisms and their structure at my biology lessons.
2) Knowledges will help we in the future to find a good job depending on what I know
3) We can get it individually by books, but in the most situations teachers give it to us.
4) I can say that marks aren't so important, marks it's how you prepare, learn or cheat, you must show your knowledge at tests, but nowadays everyone evaluate us by our marks, so you need to study well just for good number.
5) I don't like my drawing lessons, because I think it's useless. Teacher doesn't teach us how to drow, we just look at great paintings and teacher says "try to draw the same one".