You know this is a very good question. And I have a feeling many of my followers struggle with the same thing.
Since this is one of the bigger issues in life, I think its going to be a multi-stage magical project.
You will begin with doing some meditation and visualization on all the things you do like about school. Even if they are only little moments that happen now and then. Really focus in on those and don’t visualize the bad stuff or boring stuff at this time. If it pops in, just acknowledge and refocus. Really immerse yourself in the good stuff. This isn’t really the big magical part, don’t worry I am not getting all law of attraction on you, its just prep for the magic.
After you have really thought about all those things. You are going to draw, collage, or write out in descriptive imagery focused writing all the good things. Like this, I walk into class and the sun is streaming through the windows, I find a seat easily next to a girl that I like and she says hello and compliments my hair. The teacher starts class and begins on a subject I want to and need to know more about and she explains it in a manner that I can grasp. Etc… This is also mostly preparation too.
Then you make your drawing spell. There are so many methods of drawing to you. You can make a sigil on nice paper with a nice pen, the sigil could be made from words, symbols or reduced from a drawing, even from musical notes. Stones that magnify or are magnetic are great. So like a big clear quartz crystal, or a lode stone. Herbs that in aromatherapy help with memory and attentiveness like rosemary are good too, mint, even lavender to help you relax a bit. These herbs have spiritual and physical properties that aid. Look for things like that for your spell (make sure you aren’t allergic of course and avoid anything poisonous or toxic in this situation). Most of these things you can find growing just around, in neighbor’s front gardens, at parks, etc. And many are cheap to get at local grocery stores (herbal tea is a good resource for herbs too). Your parents may even have them in the cupboard. You can fold and tie all of these into a square of cloth and tie it together with ribbon, yarn, thread, or floss. Keep this drawing pouch with you in your pocket or in your backpack at school. If you lose it or something, make a new one.
Once its made, look at it and just expect it to work. Be grateful to yourself and the elements you are working with for contributing to your better life.
And hey, good luck with school. Make the most of it, get whatever out of it you can that will help you reach the immediate goal of finishing school and becoming independent and the longer term goals of being a well rounded enriched person.