I like the suggestion that we use slide rules in elementary. On the subject of graphing calculators, saying that you don't need a $100 graphing calculator beca

I like the suggestion that we use slide rules in elementary. On the subject of graphing calculators, saying that you don't need a $100 graphing calculator because you can buy a $200 netbook is as silly as trying to compare an e-reader to a netbook. On the other hand, there's no reason a good e-reader couldn't also be a good graphing calculator. And the pricing is similar.