HOW TO GET DECENT AT MATHS
Practice - try past papers, do all the questions your teacher asks, do even more if you're not quite getting the gist of it. Using past papers is a great way to practice for your exams because you can treat it like a real exam, and it'll show you how you're doing. It gives you an idea of what you need to improve on, whether it's time management, certain topics, reading the question etc.
Ask for help - if you don't know something as well as you should, your best resource is your teacher. It took me a long time to understand that the teachers are there to help and that it's worth asking questions if and when you don't understand something. Your teacher can go over something in as much detail as you need and you can ask them questions, better than reading a textbook or watching a video if you're completely lost.
Keep your class notes - class notes may not look the part but they can help you remember the time you actually learnt the information. They will be full of examples and definitions and probably more right answers to problems than in your homework. If you don't know where your notes are (I recommend a notepad instead of loose leaf paper so all of your work is together but that's just me) then ask a friend in your class if they can send a picture of that days work.
Repeat questions - repeating questions, especially long winded ones, is one of the best way to stomp out stupid mistakes. You can repeat a question and compare your answers to see if you're still doing things right. If you don't get the same answer then you have two different approaches to a question and only one of them is right, so you can learn more about your thought process by looking at where you did things differently. Are you doing it how it should be done? Check without exam board what you are and aren't allowed to do. Got the same answer but you remembered what you were trying to get to? No, it's not cheating. You remembered the steps you needed to take to get to the solution, it's almost like you're actually learning something.
Annotate long answers - if you have an example from class that you know is right then along one side of your paper annotate the steps you're taking. This will help you remember what you need to do an when, and is especially good for questions where you have to solve things differently depending on what is actually in the question. I used this when I had to remember how to do integration by substitution because I got the steps mixed up really easily.
I found these useful whenever I was stuck:
Khan Academy - YouTube channel, hundreds of videos on many different topics
Physics and Maths Tutor - Great for GCSE and A-level students. Past papers, mark schemes, questions by topic, different exam boards, model answers etc
Exam Solutions - Similar to physics and maths tutor, loads of videos that are really helpful
WolframAlpha - If you have no idea where to go with a question or want to check your answer to something, throw it into WolframAlpha and it'll give you the solutions
MyMaths - I used it for GCSE and can't really remember it but it did help me get uses to answering different types of questions









