Lousy parents + lousy school = big mystery why the kid is less than happy? Seriously?
She "sees us always in a position of authority," great, instead of as loving parents. You were hit, want to keep up the violence for the next miserable generation, great.
That sucks that you can't send her to a better school; I cannot believe you are taking such sad classroom management so seriously. If Mom AND Dad AND teacher are all totally helpless when it comes to discipline unless it's punish-punish-punish, I don't know; maybe you should go back to hitting her? Hmm
"I am thinking about taking away her art supplies or making her go to bed earlier"
What do you think that might accomplish...?
Here -- read -- THINK --
"Something Better Than Punishment"
http://www.aces.edu/pubs/docs/H/HE-0687/
"Building a Positive Relationship with Your Child"
http://www.aces.edu/pubs/docs/H/HE-0684/
"Am I Spoiling My Child?"
http://www.aces.edu/pubs/docs/H/HE-0718/
"Helping Young Children Behave"
http://www.aces.edu/pubs/docs/H/HE-0719/