If your parents absolutely do not want to buy a new cage for your bunny, then you should put some type of thick fabric over the wire. That’s only temporary though because it can still cause a rabbit to slip and slide. Unless it’s like a memory foam mat or something. Those work best most of the time. I’m sorry, as probably comes across as rude or mean, but do you know what to feed a bunny? Just because that’s the main thing before anything else, and I don’t want to hurt your feelings, but your teacher just kind of shoved you into this, and most of the time when a rabbit is adopted all of a sudden with no time for the owner to research, the owner doesn’t have any idea about the rabbit. Just to clarify, you know that rabbits need hay as their main source of food, yes? If not, that is the first thing to buy.
I’m in middle school, and since my house has a bunch of places for a mischevious bunny to get hurt, I can’t let my baby free roam during the day for eight hours. Even though my mother stays home, she doesn’t trust herself to watch over him as he runs around the house. Although, during the day it is usually my bun’s sleepy time, so for a couple hours, he wouldn’t need excercise anyways. But they still need more space than a cage can provide. You can attach a dog pen to her cage so that she has some more space. Or, if you bunny proof your home, or provide her with a room all to herself, she will be safe and can still have plenty of excercise.
Months ago, when I wanted a bunny really bad, I was not able to get one, because my parents didn’t trust me with the life of a pet. With good reason too. I was under the common misconceptions as everyone else: Bunnies are low maintanence, they only eat veggies and carrots, they should just be put in cages. But I did days of research after they said no to prove that I could take care of a bunny. I went on here mostly to find out all the basic care and info about rabbits. I recommend that you try the same, and then go back to your parents with a bunch of counterarguements and research filling your brain. That’s how I convinced them. It takes time, but it works. You can do the same to get your parents to buy you a new cage, and to provide your bunny with better care. Also, if your rabbit is a female, they get a 60 percent chance of uterinian cancer. I doubt that she is spayed already, so that would also be a priority. I don’t mean to scare you, but it’s common for them to get this. It also increases their life span.