Carrying out basic arithmetic operations is made simple with calculators. These devices are also useful for much more advanced applications. Many high school and college level mathematics classes require students to have graphing calculators. In the real world, such calculators can also come in handy in managing personal finance. For example, interest rates and profits can be programmed onto calculators with graphing capabilities. Use a coupon to save on all types of calculators, including those used in primary and secondary schools. Before shopping around for calculators, explore Giving Assistant to discover promo codes and other savings on school or office supplies.