Flexible learn - and calculating clock for handled in the learning topics o'clock, using the montessori - beads material

摘要

Learn - and calculating clock, consisting of a plurality of flexibly employable elements for handled in the learning topics o'clock, using the montessori - beads material, characterized in that, on a base plate in the middle with the help of a pin a round plate is provided with 12 uniformly, annularly arranged bores can be fixed. in order to be a ring around the latter with 12 uniformly, annularly arranged bores in the, in turn, a ring with 60 uniformly, annularly arranged comes to lie correspondingly smaller bores; this is outlined by 2 half rings.