Just some things I've put together for my class this year, that may be useful for others.
I printed them on bright coloured paper, as colour printing is quite the luxury at our school.
I've adapted rules from images that I've seen across the internet, but I've also added and edited as needed for my class.
It's editable as well, so you can add or subtract rules as you'd like.
You could also change the border easily. I chose one with stars for my class.