Expertiza is a web application where students can submit and peer-review learning objects (articles, code, web sites, etc). It is used in select courses at NC State and by professors at several other colleges and universities. The expertiza environment is already set up in NC State's VCL image "Ruby on Rails". If you have access, this is quickest way to get a development environment running for Expertiza. See the Google doc on setting up the Expertiza development environment.