Math doesn’t add up for some kids, and a weak number sense may be partly to blame. An evolutionarily ancient ability to estimate quantities takes a big hit in children with severe, ...

DURHAM, N.C. -- Babies who are good at telling the difference between large and small groups of items even before learning how to count are more likely to do better with numbers in the future, ...

Knowing how precisely a high school freshman can estimate the number of objects in a group gives you a good idea how well he has done in math as far back as kindergarten, researchers at The Johns ...