This proposal is based on studies about (non) teaching attractiveness and in the current scenario of high school teachers shortages and the lack of interest of young people to teach. The focus of the research was to analyze the professional trajectories of undergraduate course graduates in Biological Sciences at the Federal University of Rio de Janeiro, examining the extent to which graduates may or may not stop being teachers, seeking to provide information to assist in understanding this dynamic. As regards the methodological step, proposed the snow ball sample technique for locating the target subject. Among the participants, the initiative was 7 respondents, all teachers working with different formative years. For the production of data, I told both with a semi-open questionnaire as to the realization of semi-structured interviews, applying the concept of theoretical saturation. The results showed that these graduates tend to associate their choice for teaching in a strict pragmatic choice, aiming to enter on the market early, sometimes by pragmatic choice reinvented, the finding that have become teachers by the social character or the nobility of activity, but they reveal they failed or had few opportunities in other areas inside or outside the Biological Sciences. Additionally the reasons that make these graduates remain in or leave the teaching could be translated mainly by creative ways to solve problems arising from the teaching work context. Working with resignation, invent new ways of approaching the content taught, attempt of escape for a new activities linked with the education and adaptation to demotivation of the students, are ways of resistances and adaptations that are developed or not and end up influencing the prospect of abandonment or the permanence these teachers in teaching.