Research about sex differences is exciting and important! It is exciting because most people want to know how and why men and women differ in their ways of thinking. It is important, because this research has major implications for education. We know that boys and girls, on average, perform differently in a number of subjects, including mathematics and reading. If we want that boys and girls perform equally, we need to first understand the causes underlying these differences. There is still much work to do, and this blog aims to present and discuss new findings in this area.