Positive and negative numbers

This article suggests some ways of making sense of calculations involving positive and negative numbers.

A brief history of negative numbers throughout the ages

How can we help students make sense of addition and subtraction of negative numbers?

This article -useful for teachers and learners - gives a short account of the history of negative numbers.

In this article for teachers, Liz Woodham describes resources on NRICH that can help primary-aged children get to grips with negative numbers.