Kidblog allows teachers to easily create a class blog in which students may create blog posts, but all submissions must be approved before being posted. Students do not need email addresses to join. Additionally, the site is secure and students must login in order to read blog posts.
Upon signing up, I immediately found two problems with the "Basic Free" version of Kidblog: a 100MB storage limit and strict limits on filetypes that can be uploaded. I needed students to be able to upload images, Twine games, and HTML files. I also quickly realized that Kidblog is built on WordPress and that with the right plugins, I could create by own version of Kidblog.
There were only three plugins that were needed to create a Kidblog-esque blog:
Edit 8-1-15: Additional plugins that were helpful were Export User Data by Q Studio, Iframe to Embed by sw-galati.ro, Improved User Search in Backend by David Stöckl, Title to Tags by Thomas J. Belknap, WP User Avatar by flippercode, and Menus by dsader.