SQA Highers

What are the best resources to prepare for highers apart from past papers because I haven't learnt all topics yet. I need 5 As in Maths, English, Biology, Chemistry and Business. I'm worrying the most about English.

I sat all of these Highers (asides from Business) last year, so I hope that this helps:
Biology: I would highly recommend the grade booster book for revision- it contains a large amount of both 'C-grade' and 'A-grade' type questions with concise, helpful marking instructions for each individual topic- very important if you are looking for an A. I found it also a handy resource to make flashcards from, which I would strongly suggest for Biology in particular. Asides from this, the student book is a great resource, with questions for each topic as well as useful summaries. The SQA course specification document itself was really helpful to revise from- p35 onwards gives you absolutely everything you need to know- I liked to write down everything I knew from a topic and compare it with the specs to see if I had missed anything.
Chemistry: the wesbite JabChem is a great resource, with summary notes on each unit containing everything you need to know. The Hodder Gibson textbook was by far my best resource, with each topic explained in great detail and put into context, which was very helpful. Another useful textbook was the higher chemistry calculations one, which had loads of practice questions for each type of calculation- worth spending a lot of time on if you are looking for an A. Course specifications are also helpful for the more 'knowledge based' topics (most of unit 1 + 2) in which you just need to memorise things.
Maths: the website dynamic maths was excellent for finding questions on specific topics (use the question bank)- I also found the higher revision page on Madras Mathematics particularly helpful for practicing one topic at a time- they have revision sheets by topic as well as prelims practice papers etc. Likewise, textbook questions are great for topics you are struggling on- I would particularly recommend the Heinemann one.
English: I suppose its dependant on which texts you are studying, but I found BBC bitesize helpful on occasion for some analysis, both for SST and the critical essay. Mr Hoyes IB Website may include a text you are studying (eg Gatsby) and contains brilliant analysis of quotes, character profiles etc. For RUAE and some folio advice, the grade A booster was pretty useful- this article (https://www.saturdayschoolglasgow.com/post/sqa-higher-english-an-expert-guide-to-ruae) was also helpful for RUAE. For an A, I would recommend reading your texts ASAP and try to start writing essays as early as you can- the time pressure is difficult in English so knowing your texts inside out really helps with that.
Again, hope this helps- you've got this!!

I sat all of these Highers (asides from Business) last year, so I hope that this helps:
Biology: I would highly recommend the grade booster book for revision- it contains a large amount of both 'C-grade' and 'A-grade' type questions with concise, helpful marking instructions for each individual topic- very important if you are looking for an A. I found it also a handy resource to make flashcards from, which I would strongly suggest for Biology in particular. Asides from this, the student book is a great resource, with questions for each topic as well as useful summaries. The SQA course specification document itself was really helpful to revise from- p35 onwards gives you absolutely everything you need to know- I liked to write down everything I knew from a topic and compare it with the specs to see if I had missed anything.
Chemistry: the wesbite JabChem is a great resource, with summary notes on each unit containing everything you need to know. The Hodder Gibson textbook was by far my best resource, with each topic explained in great detail and put into context, which was very helpful. Another useful textbook was the higher chemistry calculations one, which had loads of practice questions for each type of calculation- worth spending a lot of time on if you are looking for an A. Course specifications are also helpful for the more 'knowledge based' topics (most of unit 1 + 2) in which you just need to memorise things.
Maths: the website dynamic maths was excellent for finding questions on specific topics (use the question bank)- I also found the higher revision page on Madras Mathematics particularly helpful for practicing one topic at a time- they have revision sheets by topic as well as prelims practice papers etc. Likewise, textbook questions are great for topics you are struggling on- I would particularly recommend the Heinemann one.
English: I suppose its dependant on which texts you are studying, but I found BBC bitesize helpful on occasion for some analysis, both for SST and the critical essay. Mr Hoyes IB Website may include a text you are studying (eg Gatsby) and contains brilliant analysis of quotes, character profiles etc. For RUAE and some folio advice, the grade A booster was pretty useful- this article (https://www.saturdayschoolglasgow.com/post/sqa-higher-english-an-expert-guide-to-ruae) was also helpful for RUAE. For an A, I would recommend reading your texts ASAP and try to start writing essays as early as you can- the time pressure is difficult in English so knowing your texts inside out really helps with that.
Again, hope this helps- you've got this!!

I cant find the summary notes on JabChem