Portfolios can be defined as “ a purposeful collection of student work that exhibits the student’s efforts, progress, and achievements in one or more areas” (Paulson, Paulson, & Meyer, 1991, p. 60).  A portfolio is a powerful assessment tool, as it is based on the systematic and often multimodal collection of a student’s work. In addition to representing a wide array of competences, portfolios may also differ in appearance, style, or presentation, thus providing evidence of students’ achievements regarding pre-defined learning outcomes.