Anyway, I came up with this little spell last Monday when my new semester in college started. Its really simple, but effective, and all you need is an apple.
I use a green apple, two reasons---1. Green apples are my favorite to eat, which is what you'll be doing with this spell and 2. Green is a color of wealth and we're seeking a wealth of knowledge. It can also represent a need for growth and the ability to pursue new ideas.
All you do is take the apple in your hands, preferably before you head out to school or do you homework or sit down to study, and focus your energy. Visualize yourself in school, attentive to your teachers and interacting in class, or settling down with your text books and cracking down on your homework, or studying, whichever you need to do. Hold those thoughts and feelings and let the apple absorb them before giving an affirmation like "I clearly understand my subjects" or "I will make great advancements in my studies" or "I will focus on my work free of distraction", whatever you need specifically. Eat the apple and give thanks to your deities. I go outside an bury my apple core in our court yard while I do this, but disposal practices are up to the individual user

Hope this helps anyone who likes it,
Blessed Be!