Learning aid cards, carrying text and graphics, are linked together at their edges for folding against each other

摘要

The learning aid, with a number of cards (1a-1e) showing the material to be learned as text (5) and graphics (4), has links (2a-2d) holding the cards together at their edges (3a,3b) so that they can be folded against each other. The links between the cards are folds, spirals or clips. The cards are structured to repel moisture.