school leaders and teachers should develop strategies together to support promoted students who are struggling with certain subjects and give teachers access to staff with expertise to help those students the greater the variety of opportunities to learn the higher the probability that all students will benefit under certain circumstances the school year can be reorganised to extend learning time by introducing remedial classes before or after school at saturday school or at summer school spending more time at school is positive for students with unfavourable afterschool learning environments oecd c