I am trying to find a reputable Maths course (preferably
online) for gap-year students who have done GCSE maths but who need to
brush up on their maths skills in the summer vac before starting at
university, to prepare for doing statistics and quantitative research
methods in a range of disciplines (e.g., psychology, anthropology,
politics, land economy, linguistics, education, geography etc). IAny recommendations would be welcome.