Traditionally, portfolios have been used as a visual arts tool showcasing an artist's accomplishments and personally favored works. Today, maintaining a portfolio in the classroom has been found to have many uses both to the teacher and the student. And the contents are just as diverse as the students who create them. A folder--paper or electronic--containing a student's work from start to finish allows the teacher and the student to evaluate the strengths and weaknesses of various works. Whatever medium or method is used, the value of developing a student portfolio is priceless. A well-kept portfolio mirrors the comprehension and performance of a student. This article is divided into the following sections: The Paper Portfolio vs. the Electronic Portfolio; Pupil Pages; Using Both Paper and Electronic Portfolios; and For Further Exploration (brief list of related Web sites and publications).