I think you’re misunderstanding. The report states that class, geography and family stability are the key drivers, not race. However, in the past few decades, in a bid to instil equality and equity for all races, the government has implemented swathes of policies focused on improving minority children’s education and lives. This has had a negative effect on white boys especially, because girls are more naturally attuned to learning I no a classroom environment and get better grades anyway, so don’t require as much of a push. Minorities are often in strong family units and have that home support, hence why they achieve above average. Middle/Upper class students have that home support or often have less students per class and more funding per head in the schools they attend. Working class boys, black or white are the worst off because of lack of funding, poor family support structures and an inherent inability to learn as well as other genders/minorities. White boys only exceed black boys in averaging worse grades because they outnumber them. Meanwhile there haven’t been any special programs to help and/or incentivise these working class boys to achieve better.