Edutopia, a web site of the George Lucas Educational Foundation, has a number of articles related to assessment. Includes articles, research, video clips, and resources.
Although no longer kept up-to-date, this web site for the Eric Clearinghouse on Assessment and Evaluation still provides useful information on assessment, evaluation, and research methodology.
The Test Collection at ETS is a library of more than 25,000 tests and other measurement devices that makes information on standardized tests and research instruments available to researchers, graduate students, and teachers.
Music Education Standards and Assessment | A Music Educators Resource
Information from the 50 U.S. states in one place, giving music educators access to vital information and best practices from across the country. The website includes information on music standards, teacher evaluation policies, and contacts for all state departments of education and music educator association organizations. Visitors can provide updates and participate in state-level discussion forums.