Solving your learning equation involves balancing two sides,
focusing not just on maths content (knowledge, skills and understanding),
but crucially on what I call "learnability".
Effective learning needs us to be in the right mood for learning (and teaching).
Perhaps your confidence or motivation needs boosting.
Or maybe lots of maths methods have gone into your head, but come out jumbled up - which we could work on to make the memory hooks more reliable, or you might be better focussing on developing the habit of always asking yourself, "does my answer seem realistic or ridiculous?"
And other problem-solving skills might well boost your maths performance considerably.

 So I diagnose not just strengths and weaknesses of your maths, but also your learning style,
especially what helps things to stick better (which often doesn't get enough attention).

I like to use creative, innovative (wow!) approaches, developed from 25 years of varied teaching and insight,
partly because these fire up my teaching as well as inspire learning.
Like a juggling starter or mind-reading algebra tricks. Maybe you'll like my multi-purpose Pizza Bump Up/Down method (with a pizza memory story) to combine what are often presented separately into a single method.

The secret is to find ways that work for you - to make maths make more sense to you, make it stick better for you, and thus make it work better for you. I re-visit keystones repeatedly as pillars upon which so much maths rests (such as understanding splits in its various guises - from implicit / intuitive proportion to fractions, percentages, decimals and what I like to call "rat-i-o"!

 And if you've come, like many people, to dread algebra because you've been rushed into mathematical shorthand (like 4x+3=2x+10), I demystify it by showing you that algebra is all about patterns and connections first, while the standard algebra letters language is just one way of describing and working with those patterns, a servant not a master, albeit a very powerful servant.

 I'm convinced that wow! thinking = the single most important skill to be gained from school maths, not  just in everyday life, but for A-level / other post-GCSE specialist maths learning, and in work. We need far more emphasis (in maths teaching and learning) on clear, logical effective reasoning,  - and checking it if the result seems daft (e.g. way too high or low).