Brian Monetti, I work at Noodle Education!
On the pages for Colleges, Law Schools, MBA programs, and K12 Schools, we list rankings at the bottom of the page, from sources such as US News and Forbes. An example can be found here. These are collected directly from the organizations who generate and publish the rankings.
Noodle also creates our own Report Cards, which are the graphs you see at the top of a K12 School or College page, and also in search results, such as here. These report cards are generated from many data points, ranging from standardized test scores to bullying data for the particular school. You can learn more about the Report Cards here.