Portfolios are collections of student work representing a selection of performance.
Portfolios in classrooms today are derived from the visual and performing arts tradition in which they serve to showcase artists' accomplishments and personally favored works. A portfolio may be a folder containing a student's best pieces and the student's evaluation of the strengths and weaknesses of the pieces. More teachers have recently begun using portfolios in all curricular areas. Portfolios are useful as a support to the new instructional approaches that emphasize the student's role in constructing understanding and the teacher's role in promoting understanding. For example, in writing instruction, portfolios can function to illustrate the range of assignments, goals, and audiences for which a student produced written material.