(First of all I want to say sorry for my english, 'cause it's not my mother tongue.)
School will start soon and I want to give you some advice before it's too late.
school supplies
notebooks
You could buy a simple notebook and later at home you can decorate it with anything you want. Stickers, washi tape or you can write or draw something on the front.
pens
Honestly I really like gel pens and I heard that the muji gel pens are good. Other brand: Pentel, Tratto and Pilot G-2.
binders
Binders are one of my favourite school supplies. There are so many color and pattern to choose. I think that they are really convenient because you can have more than one subjekct in one place.
highlighters
I prefer pastel highlighters because the color is less intense than fluo colors. Buy more than one color of highlighter because trust me, you'll need more than one color.
pencils
For pencils I suggest a simple pencil, you don't need a fancy and expensive pencil, they all do the same work. If you have art class, you have to wait until the teacher says what he\she wants for his\her class.
erasers
For the erasers are the same thing as for pencils.
water bottles
Buy a water bottle that you can fit easily in your backpack.
pencil case
Buy a pencil case that you know can contain all your stuff.
backpack
Other brand beside Fjällräven Kanken are Eastpack, Invicta and Vans.
I hope you enjoyed this article and thank you so much if you left an heart.