My reward system is raffle tickets!!
I print these on colored paper and cut them out.
I use these to reward students who are showing the right behavior, doing the right thing, and being responsible.
I use it for motivation, I tell students I will give them one if they do something in particular.
Half of them are for speaking French in the classroom.
I also use them for parallel praising. If a student is doing something really well I make it clear why I am giving it to him or her and give on to them, that way all other students show the same behavior.
Halfway through the year I also started a system where students are able to get a ticket if they correct someone who uses an English words and are able to say the word in French! It works really well!!
I pick out 3 to 4 tickets at the end of the day when the class is clean. Students whose names are picked can go in the surprise box. In the box students can get ticket to sit on the teacher's chair, have lunch with a friend, bring an ipod on Friday for art class or bring a toy for show and tell.