These apps have really helped me a lot with maths. 1) Photomath - it's like a calculator for any sums but it gives you step-by-step instructions on how to do it. It doesn't work with hand written problems or word problem. 2) Got it! - You send a picture of any problem (word or numerical) and a tutor will help you with it. It's basically like grinds but online!! Both apps really helped me and they're free! I recommend you download them!