In early days calculations were performed manually in which chances of human error are high. Thereafter Logarithmic Tables were introduced. No doubt Log table calculations were relatively faster than manual however chances of human error can’t be ruled out. After Log Tables, came the slide-rules in the subject of math. After the slide-rules came the electronic calculators. In slide-rules and calculators the calculations used to be very fast and chances of human error were less. Finally now computers have been introduced in the education. Subject of Mathematics is best taught with the help of computers. However with the help of computers, descriptive subjects like History, Geography, Civics, Social Studies, can also be well taught as it is capable of giving past and history and present developments.