The original report of this investigation into career development among secondary school teachers was published in Dutch and contained two parts. The first part was a coherent survey of literature about adult (career) development which formed a necessary condition for a justified division into different age groups of teachers involved in the investigation. A summary of this study serves as a preface to the present study. The study investigated the affect of mid-life crisis in teachers on their attitudes toward their work and their satisfaction with their jobs. Detailed discussions are presented on: (1) motives regarding professional choice among future teachers; (2) developments concerning the age build-up of the teacher population; (3) the construction of the evaluation instrument used to survey 2,000 teachers; and (4) results. Discussions in the section on results center around the connection between orientation and satisfaction in relation to age, and differences in job satisfaction as they relate to the subject taught and teaching conditions. A 19-page bibliography, the survey instrument, and the tabulated data relating to it are appended. (JD)