This literature review and annotated bibliography addresses teaching portfolios, utilized by teachers to improve and demonstrate their knowledge and skills in teaching. The document, organized into three sections, discusses several key issues related to teaching portfolios. The first section on issues in portfolio design and implementation includes: (1) what is a teaching portfolio (or teaching dossier, as it is referred to in some of the higher education literature)? (2) what purposes can it serve? (3) what dimensions of teaching are important to document in a portfolio? (4) what kinds of evidence should go into a teaching portfolio? (5) how should evidence be selected? and (6) how should a teaching portfolio be evaluated? Section 2 identifies projects and organizations in the field that are exploring alternative forms of teacher assessment, including the use of teaching portfolios. The final section presents an annotated bibliography categorized by projects in which portfolios have been employed. This section is divided into two parts, one on portfolios for K-12 educators and the other on portfolios for higher education faculty. Each part lists authors in alphabetical order. (LL)