Personally, to learn equations I like to draw them out lots and test myself. I might look at an equation, draw it out a few times and then try and draw it out without looking at it.
I also used to have a big poster on my bedroom wall when I was at school that had all the important equations etc I needed to learn (and eventually I had bits all over the house for different topics- but not all parents might be happy about that!). I made them in lots of colours with pictures to help me.
Sometimes learning equations is hard, but it’s always easier if you understand what the equation really means. If you’re not sure of the meaning get your teacher to explain it again, or discuss it with your friends. Equations are never just numbers and symbols, they are a description of something and are there to help you understand it.
Actually using the equations is the best way to remember them. Doing problems will really help you to understand how they work. In physics and maths it eventually becomes easier to talk about scientific concepts using equations rather than words.