Being unpopular made me tough as hell. I got used to incessant criticism, of myself and everything I did. It stopped bothering me to the same degree. When you are the class whipping girl, every aspect of your existence is a problem to someone. It taught me to pay attention to the misfits, the people on the fringe, the purple cows. After all, I was one of them. I still am.
There is very little that I would specifically recommend to student teachers, but I would remind them that the way in which row interact with disabled students will be copied by other students. Students learn far more than just the curriculum from teachers and a nervous teacher will lead on to an isolated pupil
My little brother says he's glad he doesn't have girls at school because he can't stand them. I politely informed him that in the workplace he would have to put up with girls. Very few professions provide single sex environments, so boys and girls need to learn to get along and work together. School prepares you for that.
What is it that makes you happy? For many people, life satisfaction will be influenced by many different factors, including their family and education. For those working in the education world, the aim of achieving happiness for pupils once they leave school and become adults may be a motivating factor, but rarely something they can focus on day-to-day...