Here is a great way to display your behaviour expectations in the classroom. There are 7 steps ranging from Superstar to Office referral. I find that this follows the majority of School's Behaviour Plans.
I had wooden pegs with each student's name on it that would peg onto the side and be able to move throughout the day as such. You can also laminate student names and blue tac it on. All my students started at You're A Learner at the beginning of every day.
This chart represents both positive and negative consequences, it is also really handy for the Teacher to see where students are in their behaviour, especially at the end of the day. You can take a picture at the end of the day to keep a record.
Personally, my reward system incorporated students receiving a ticket into a weekly prize raffle if their name was at the very top at the end of the day. You can also give tickets during the day for students reaching the top.