Being sad and being depressed are two different things. Also, people going through depression don't look so, while someone sad will look sad. The most common reaction is, 'How can you be depressed? You have everything going for you. You are the supposed number one heroine and have a plush home, car, movies... What else do you want?'
I think that life is difficult. People have challenges. Family members get sick, people get older, you don't always get the job or the promotion that you want. You have conflicts in your life. And really, life is about your resilience and your ability to go through your life and all of the ups and downs with a positive attitude.
Research shows that there is only half as much variation in student achievement between schools as there is among classrooms in the same school. If you want your child to get the best education possible, it is actually more important to get him assigned to a great teacher than to a great school.