It is an excellent self-marketing tool for employability. It is also required in some states for teacher licensure.
Portfolios are performance based and offers the reader evidence of expertise and experience.
A performance based product is a means of storing and displaying evidence of a teacher's knowledge and skills. The product, unlike the more traditional means of assessment, can reflect the richness and complexity of teaching over extended periods of time. The teachers developing a PBP are empowered to evaluate their own progress and improve their skills. Additionally, the PBP allows an individual to display competence creatively. The PBP is both process and product in nature.