1. A non-transitory machine-readable medium storing instructions for presenting a question item of an electronic learning curriculum, said instructions, when executed by a processor of a computing device, causing said computing device to: (a) retrieve from a data store a question item comprising: textual, visual or auditory subject matter; a query or instruction pertaining to said subject matter; and a representation of a response mechanism for receiving a user response to said query or instruction; (b) present said subject matter, said query or instruction and said response mechanism in a presentation sequence, wherein a presentation duration of each of said subject matter, said query or instruction and said response mechanism in said presentation sequence is controlled by, and is measured on the basis of, user input for advancing through the presentation sequence; (c) based on said user input, determine: a presentation duration of said subject matter by measuring a duration of display of the subject matter; a presentation duration of said query or instruction by measuring a duration of display of the query or instruction; and a presentation duration of said response mechanism by measuring a duration of display of the response mechanism; and (d) store indicators of each of said three presentation durations.