FlashWorks is a vocabulary drilling program for Biblical text. Each word is tagged for difficulty, type (noun, verb, etc.), chapter, and frequency. You can ask for any cross section you wish, such as "all verbs occurring more than 30 times in the New Testament that occur in chapters 16 through 24 in the textbook and which I have tagged with a difficulty rating of three through five" (five being the most difficult for you). FlashWorks remembers words as you get them right and/or wrong and can automatically set the difficulty rating.
