During your revision time, you will find that you need extra assistance. If it's too late for tuitions, go online and search for websites that will help you achieve your desired grades.
To cut you some research time, here is a list
YOUTUBE:
Maths: D math academy
ICT : Evans Chikasa
Yahmad
Biology/ Physics/ Chemistry: Science With Hazel
Literature/ English language: Mr. Everything English {This man saved my life, I'm not even exagerating}
All Subjects: Cambridge in 5 minutes
Al Khan Academy
Stuart Ratcliffe {I only watched his 'Germany Depth Study' vid, and it was very helpful}
WEBSITES:
History: Ms. Douglas' History Blog (https://douglashistory.wordpress.com/) {This website seriously helped me A LOT, everything is classified topic wise and so organised}
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Tips For Your Exams
Random*Mainly tips for (I)GCSEs but can be useful for other exams too* Just a compilation of mini tips to help you with your exams. If you have any tips to add, comment them or dm me so I can add them (I'll give you credit and a shout out)