Hello, I'm Mr Firth, and I need your help today as we learn to add and subtract within ten. You can use lots of things to help you add and subtract. Counters, number lines and even your fingers. Let's ...

More, more, more! We seem to have an innate drive toward addition—blind faith that more is always better. We make our burgers bigger, add more toppings, and throw in a supersized order of loaded fries ...

The present paper describes the success, the methods (mental, informal written, standard algorithm) and the strategies of informal written arithmetic to be observed when 300 elementary students worked ...

Our pitch calls have yielded remarkable stories, and we want to keep that ball rolling. So it’s time for the next theme. As a refresher: These should be adventures with technology—stories that ...

Jackson Ryan was CNET's science editor, and a multiple award-winning one at that. Earlier, he'd been a scientist, but he realized he wasn't very happy sitting at a lab bench all day. Science writing, ...

This study examined Korean second and third graders' understanding of multidigit addition and subtraction and particularly their ability to explain the trading required when a column sum of the ...