Steve McQueen’s Small Axe portmanteau of five roughly hourlong films centered on racial issues in second-half 20th century UK wraps up with Education, which, at the end of the day, is what the series is all about: education in terms of the efforts of different segments of the population to begin understand each other, to cast off ill-informed presumptions and long-entrenched prejudices, creating more opportunities and learning that the “other” should ideally create more possibilities than