När ras, klass och kön samspelar:
https://www.washingtonpost.com/news/wonk/wp/2015/11/23/why-girls-do-so-much-better-than-boys-in-school/
“They found that boys start to fall behind girls at an early age. They are less likely to be kindergarten-ready according to a state checklist of skills — less likely to identify letters of the alphabet, less likely to be able to communicate their needs. The differences are most dramatic among children who are black and those from disadvantaged households.”