Karen C. Fuson, Diana Wearne, James C. Hiebert, Hanlie G. Murray, Pieter G. Human, Alwyn I. Olivier, Thomas P. Carpenter and Elizabeth Fennema Researchers from 4 projects with a problem-solving ...

“For some, common core is creating common confusion,” said education correspondent Rehema Ellis on a recent NBC News segment. The crux of the news piece was that parents are struggling to help their ...

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 ...

Speaker: Addition is the process of adding 2 or more numbers or amounts together to get a total. If I start on the ground floor I've got to go up 9 floors to get to the top. That's 0 add 9, which ...

You two made a film? Wow, impressive. Oh dear, people don’t seem to be enjoying it do they? That’s alright, we can use number columns to figure out how many people are still here. Number columns allow ...