In one implementation, a computer-implemented method for providing a graphical user interface (GUI) that teaches correct placement of accent marks on Spanish language words through a particular sequence of graphical elements includes receiving, through a GUI presented by a computing device, a selection of a graphical word element corresponding to a word to test as part of a Spanish language teaching program; identifying, by the computing device, a particular word set that corresponds to the word from among a plurality of word sets; and outputting, in the GUI presented by the computing device and based on the particular word set, a first graphical prompt element for the user to identify whether the word has a particular ending characteristic that corresponds to the particular word set.