1. One or more processor-accessible hardware storage media, comprising processor-executable instructions for user evaluation in a collaborative online forum, wherein the processor-executable instructions, when executed, direct one or more devices to perform acts comprising: evaluating multiple users automatically and without manual intervention based on a combination of post scores of one or more posts submitted to the collaborative online forum and on user interactions in the collaborative online forum, the user interactions being derived from the one or more posts among the multiple users being evaluated for contributing in the one or more posts, the one or more posts comprise content that reflects user ideas represented by user entered phrases of adjacent words discussing a topic relevant to a leading post in a thread and a sub-forum in the collaborative online forum, the evaluating comprising: accessing the one or more posts that are associated with the multiple users; ascertaining the post scores for the one or more posts based on one or more features, wherein the one or more features include a relevance feature group comprising at least: (i) a first feature that measures whether a given post is on thread topic and (ii) a second feature that measures whether the given post is on sub-forum topic; analyzing the user interactions with regard to the one or more posts to identify relationships among the multiple users and the content included in the one or more posts; and evaluating the combination of the post scores and the user interactions to determine respective collaboration scores for respective users of the multiple users responsive to multiple metrics; and presenting a user interface that provides access to the collaboration scores via a supervisor dashboard that displays interactivity graphs reflecting interactions between and among at least selected ones of the multiple users.