A Fitchburg teacher’s aide briefly placed on leave when the school district found out about her second career as a lingerie model says she thinks she is a good example for her students. In her first public statements, Kaitlin Pearson, 23, said in broadcast interviews that she is a college graduate who got good grades. She said that her special needs students at a Fitchburg elementary school did not know about her second career and that they would not care because they are more interested in dinosaurs. She thanked the person who anonymously sent a package of racy photos to the school superintendent, prompting her paid leave, because it has given her positive publicity. She was reinstated this week.