DerDracolage has as usual already given incredible advice and is 100% right that 4 A levels is a bad idea (unless double maths is taken) and that dropping one of the sciences and keeping economics/psychology won’t help your daughter access the courses she is most interested in.
I used to mentor A level chemistry and maths throughout my time in sixth form and in my gap year and this was the advice I often gave:
1. You will want dedicated revision resources to go to in order to check your understanding of the material covered in class. If you know what exam boards she is with for each subject, stating them here will make it possible for users here to give subject-specific advice. Regardless, PMT is a highly recommended revision resource at both GCSE and A level for a wide range of subjects and exam boards:
https://www.physicsandmathstutor.com2. You will need to remember much of what you learnt in GCSE maths for the A level sciences. OCR has published maths skills guides that work for all the major exam boards courses for each subject so you can stay on top of all the maths you will ever need without taking A level maths:
https://www.ocr.org.uk/Images/294471-biology-mathematical-skills-handbook.pdfhttps://www.ocr.org.uk/Images/295468-chemistry-mathematical-skills-handbook.pdfhttps://www.ocr.org.uk/Images/295471-mathematical-skills-handbook.pdf3. Have a dedicated routine. Know when you need to get up and go to bed to set the start and end points of each day and set alarms. If you can set general timetables for a typical weekday and a typical day on the weekend, great!
4. Don’t spend long, consecutive hours studying as it won’t benefit you and instead study in bursts of maybe up to an hour with 15 minute breaks between. I also advise not listening to music when studying as it has been shown to be detrimental to study.
5. Use active recall methods for the sciences! These may well be flashcards, writing mindmaps onto a piece of paper or doing a quiz on something like quizlet or sporcle. You are expected to memorise a lot for these subjects and this is one of the most important things you can do.
6. There is no point 6.
7. Use your free periods well and wisely - especially if you don’t have a quiet room to study in at home. These will probably be your most productive hours of study.
8. Make sure you use past papers routinely. Mark them and use the examiner’s report to understand common mistakes and misconceptions associated with each question and keep some record of questions you’ve lost marks on. This could be done by making flashcards out of the question on one side and the mark scheme on the other.
9. Enjoy yourself and don’t overdo it. You will not succeed at GCSE or A level if you compromise your health and wellbeing.