Reckoning rope a reckoning apparatus for basic mathematical skills and demonstrating geometrical phenomena this reckoning rope with eyelets was used in the middle ages they were at that time used as ropes with 12 or 13 knots however it is soon apparent that more than simple measurements can be made with this rope for kindergardens this can be used to demonstarte addition and subtraction children can pass their fingers through the eyelets and make different shapes much simply use it as a skippi