The language a child speaks affects the rate at which they learn number words, and hearing number words in natural conversation – not just in counting routines – is a critical part of learning the ...

A new study finds that in a Bolivian rainforest society, children learn to count just like in the United States, but on a delayed timetable. American children learn the meanings of number words ...

Corrected: An earlier version of this story incorrectly identified the tiers associated with challenging words. Children who enter kindergarten with a small vocabulary don’t get taught enough ...