Scoring / weighting system for Knowledge objects

Each user should be able to score an object, to indicate how useful or valuable it is to them.

This information is explorable for anyone - you should be able to discover which objects a given user values, or at a larger scale, which objects a role (like instructors) value, or in aggregate, which objects have a consensus as being the most valuable.

However must avoid the social media like issues this is something to really think about.