On the one hand, you can work with these index cards for a good system. The children can independently control how often they have learned their vocabulary. In addition, the layout already appeals to the eye and it's fun to keep so beautifully designed card hand. On the other hand, if you work simultaneously with a Lernbox, the beautiful colorful circles to check off are superfluous. In addition, leaves the paper quality (too thin) to be desired, as a learning index card that goes often through the hands, thick and therefore must be more robust.