An online learning system

An online learning system including a data structure including:<div><br></div><div>(i)   task identifiers representing respective tasks;</div><div>(ii)  user identifiers representing respective users; and</div><div>(iii) at least one group identifiers being associated to define a user as belonging to a group, and a task as belonging to a group; and a user interface for accessing data for the task on the basis of at least one the identifiers.</div>