The Stackz flashcard visualization concept helps to keep the overview over a large amount of words to be learned. The cards are graphically distributed according to the two characteristics 'mastery level' and 'date of the last mastery'. The Stackz system allows to learn any language or other items. With the PDA version of this program the words can be learned at any place, and synchronized with the PC later on. Version 7 major upgrade with new GUI and new tools.