30. The method of claim 22 , wherein at least one of a calculated new level of difficulty, a calculated new delivery interval, and a calculated new content area for a subsequent question includes a change to at least one of the level of difficulty, the delivery interval, or the content area for the subsequent question.
22. The method of claim 1 , wherein the question and the selected list of responses to the question in step h are re-presented to the subject user over spaced intervals of time until the subject user reaches a pre-established level of proficiency.