I had her when I was a student and although we didn't always agree with social things, but she always made sure she was available for help after school hours. She was a bit tough, but decent overall.
No matter how hard you try, you either will or wont get it with Mrs Obert. With me I just couldnt get it.
Sadly, you will not appreciate what you learn from her class until you graduate. Believe it or not, A's aren't the most important thing.
A very nice teacher just give her a shot. Always there after school to help you with your homework, truly cares about your grade and how your doing.
In HS I didn't understand that she was actually the best teacher of my life.