ABSTRACT
Factors influencing the successful introduction of portfolios are described. A portfolio is a purposeful collection of all kinds of documents and other artefacts that together give an impression of how tasks were fulfilled and how competence has developed. A portfolio can also contain reflections and plans for future development. Although portfolios are often promoted as valuable instruments in innovative educational practices, the introduction of portfolios in everyday education often leads to disappointment. Factors that influence the success of the introduction of portfolios are the match between the purpose of using a portfolio and the portfolio content and structure; the educational configuration in which the portfolio is introduced; the support of teachers, students and educational leaders; and the availability of an adequate infrastructure.