1. A computer-implemented method comprising: receiving, at a server, an online question by an asking user from a user device of the asking user over a communications network; identifying, with the server, one or more topics of the received online question; matching, with the server, at least one canonical content item from a plurality of canonical content items to the received online question based on the identified one or more topics, wherein each canonical content item of the plurality of canonical content items includes a model explanation of a topic stored at the server, wherein each model explanation comprises an asked question portion and a corresponding answer portion, and wherein each canonical content item is based on a set of similar content items from a plurality of content items; providing, to the user device over the communications network, the asked question portion and the corresponding answer portion of the matched at least one canonical content item to the asking user; executing one or more clustering techniques over the plurality of content items to determine each set of similar content items, wherein the plurality of content items relates to user-submitted online questions and corresponding user-submitted online answers; compiling the plurality of canonical content items based on a curating process associated with one or more clusters of content items from each set of similar content items from the plurality of content items; and receiving a rating, by the asking user, for the matched at least one canonical content item, wherein the rating identifies the asking user's approval of the model explanation of the topic associated with the matched at least one canonical content item and is used as a factor in the curating process associated with one or more clusters of content items.