Newsflash: A teacher's day does not end at 3:30. There are new lessons to write, papers to grade, phone calls to parents to make. And if you're teaching more than one subject, this can take hours. I don't know where you're getting "4 breaks a day" either. I got 2 free periods and a lunch, during which I often met with students to give extra help. And there were mandatory meetings after school sometimes, and parent/teacher night and afternoon.
You left out the teachers lounge with free martini’s and champagne!
Newsflash: The day doesn't end for many of us in other fields after we 'clock out' either. I sometimes get called at 4am because of network issues I have to assist with. I'd LOVE to have 3 months a year off, as well as almost every federal holiday, and 2 weeks for Christmas.