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 ...

“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 ...

Fact families are groups of numbers that have a relationship to each other. For each pair of addition facts, there are also two subtraction facts in the same family. Here is a fact family using the ...

Japanese macaques gather to keep warm at Takasakiyama Monkey Park in the city of Oita on Dec. 23, 2022. (Mainichi/Nao Ishii) TOKYO -- A team of scientists in Japan recently announced the discovery of ...