This document provides background on research into electronic portfolios and their impact on student engagement and learning. It discusses that while portfolios are widely used, the empirical research is limited. It explores the multiple purposes of portfolios, from learning to assessment. Portfolios can increase student reflection and understanding of their own growth over time. However, portfolios designed for assessment may conflict with those focused on the learning process. More research is needed on how technology can support portfolios' original goals of student reflection and growth.