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Great recommendations for chemistry and biology websites

My daughter is studying A level biology, chemistry and psychology; she’s trying out Uplearning’s 3-day free trial atm, and so far is impressed. Unfortunately, the website is updating its chemistry and biology sections, and these won’t be available until September 2020. Cloudlearn has mainly good reviews, although 5 people gave it pretty dreadful reviews, which I’ve found off putting. Can anyone recommend a brilliant website that can offer my daughter support and revision for biology and chemistry? Websites that have guarantees would be greatly appreciated. Many thanks