Patent ID: 8021159

Claim:
A method to teach math facts to a student or to learn math facts, comprising: obtaining a particular number family set representing all of the math facts in said particular number family, wherein said particular number family set comprises a plurality of strings, each of said plurality of strings having a specified number of total holed objects and each of said plurality of strings configured to represent one of said math facts, each of said plurality of strings being threaded with a first series of first-variation holed objects having a first discriminating characteristic, with a portion of said plurality of strings being threaded with said first series of first-variation holed objects having a first discriminating characteristic and with a second series of second-variation holed objects having a second discriminating characteristic, wherein each string in said number family set has the same number of total holed objects and a different number of first-variation holed objects; removing a first one of said plurality of strings from said particular number family set; sliding said first series of first-variation holed objects along said first one of said plurality of strings; and correlating said first series of first-variation holed objects to a numeral in a first math fact.