Abstract: There is provided a learning management system comprising: a display; and a processing element in electronic communication with the display, the processing element configured to perform the following operations: generate a plurality of nodes, wherein the nodes correspond to an item of content; implement a testing module that selects a first node of the plurality of nodes to display on the display, wherein the first node outputs to the display one or more questions to a user and prompts the user to select an answer; and implement a confidence metric that prompts the user to select a value corresponding with the user's confidence that the selected answer is correct, wherein the selected answer and the confidence metric value for the first node are used to determine a second node from a plurality of nodes to display to the user next.

Abstract: A product catalog with a collection of information about products with the presentation of the information including, at least for certain products contained in the catalog, a machine-readable product code, which contains information about the product. To make it as easy as possible for the user to order products presented in the catalog in an automated manner that saves times and has low susceptibility to error, at least one identification means with individual data of a user of the product catalog for identifying the user is arranged in or on the product catalog such that it can be read out together with at least one product code by a reading device. A method for automatic ordering by a user of products presented in a product catalog or of graphical or virtual representations of such products, and a computer program product for automated performance of the method is also described.