Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for training users. The methods, systems, and apparatus include actions of obtaining multiple training modules that each correspond to a different time interval associated with a training program, each training module specifying one or more respective training tasks. Additional actions include identifying a particular training module and providing a notification that the particular training module is available for access. Further actions include receiving a request to access one or more tasks associated with the particular training module and providing one or more particular training tasks. More actions include receiving, at a later time, an indication of completion of the one or more particular training tasks and determining that the corresponding time interval is also associated with the later time. Additional actions include generating a score for the particular training module.