Have you ever wonder why calculators can be used in examination now compare to our time? refer to http://moe.edu.sg/education/syllabuses/sciences/files/maths-primary-2007.pdf
Intelligent can be defined as having more refined schema and more schema created. According to Jean Piaget, intellectual development happened in two ways, assimilation and accommodation. Therefore, children need to be able to handle problem that required thinking skill rather than just knowing how to do what a calculator can do. We have to create opportunity for the children to acquire problem solving skill rather than computation skills.