What Is an Abacus? ~ 'Number Plates' Basically, an abacus is a finger maneuvered calculator. A typical abacus is made up of a shallow frame containing columns holding beads. You can slide the beads side to side on their columns. There are varied models but they generally follow a similar pattern. Abacus comes manufactured in various materials, including wire columns. How long has it been in existence? ~ 'Prime Numbers' Various versions of the abacus can be traced back over the centuries, with many countries using them, such as, not surprisingly, the Greeks. Archaeological evidence for the use of the abacus is pinpointed right back to the ...  Read the complete review

As many of you know, I teach my son at home. I tend to focus more on learning than testing, so I am happy enough for him to use an aid as long as needed to help him with his maths. I have found this very useful as if he is not sure of answer, he can just figure it out using this. Because my son is young, and home taught, he never has "wrong" answers, we just keep trying until he figures it out. The abacus is described as large. I do not really think it is very large, but I suppose that is a matter of opinion. The actual measurements are about 11" x 8". It does look a bit flimsy as well and I have been careful to see that it is put away on ...  Read the complete review