Abstract: A sever with processor(s) and memory provides a user interface to a client device for presentation to a user including user interface objects corresponding to functions of an online application. The server obtains a user profile for the user, including performance metrics of the user and determines whether to provide informative materials to the client device based on the user profile. In accordance with a determination that the informative materials are to be superimposed on the user interface, the server: determines a portion of the informative materials to be provided to the client device based on the performance metrics of the user; and provides the portion of the informative materials to the client device for presentation to the user, including media content overlaid on the user interface. The server responds to user interaction with any of the user interface objects by performing corresponding functions of the online application.