This is part of a series of essays during the COVID-19 pandemic designed to help journalists and all public writers achieve what I have been calling “civic clarity.” That quality in prose comes from ...

Students in Melissa Williams' kindergarten class at the Westminster School in Atlanta, Georgia, practice connecting quantities to written numbers — a key part of number sense. Credit: Holly Korbey for ...

In pre-kindergarten, children ages 3-5 develop a basic understanding of numbers and counting, and connect both to the idea of “how many.” Pre-k math tips work on recognizing, grouping, and comparing ...

Numeracy or numerosity, the ability to think about and use numbers, varies among human cultures and within populations, much like intelligence does. Many known languages, for example, have no words ...

The ‘mental number line’ theory doesn’t appear to hold up vertically. In A Nutshell When people viewed vertical lines filled ...