Countries vary in the way they use marks, but they all tend to reward the mastery of skills and attitudes that promote learning. Teachers tend to give girls and socio-economically advantaged students better school marks, even if they don’t have better performance and attitudes than boys and...

Life expectancy at age 65 years old is the average number of years that a person at that age can be expected to live, assuming that age-specific mortality levels remain constant. However, the actual age-specific death rate of any particular birth cohort cannot be known in advance. If rates are...

When you think of someone who is an engineer, do you imagine a man or a woman wearing a hardhat? How about when you imagine a teacher standing in front of a class of schoolchildren? If you answer “a man” to the first question, and “a woman” to the second, there’s probably a reason. And...