I always did well in art class, I even went to college for art, and am employed in that field. But I had to work hard in my other classes as well. 7th grade is no time to slack off at any given subject. You vaccilate between saying you get all A's and then this, saying you are going to be a veterinarian, then complaining about your science classes ... which is why you need to try hard in all your classes. You are 12, and have a long life ahead of you! School is not just a waste of time, it's the only period of your life that you get to devote to the education that you will need to do well for the rest of it.

It is NOT true that "kids cannot have depression." Clinical depression is an illness that can strike pre-teens and teens as well as adults, and should be treated seriously. That said, you may be just upset right now, which is quite different from clinical depression. There are many resources on the web for depression.

If you are having trouble in your science class, ask your teacher for extra help. If he refuses, ask another teacher, another science teacher or even a teacher you had last year. Don't give up because of one teacher!

In 7th grade, you should be a generalist, wait a few years before you specialize in any one area to the detriment of others, okay?