I use these cards to allow the students some leadership opportunities within the lesson. It also allows the students to work as a team. There are 4/5 teams and within the teams everyone has a little miss role. There can be 2 or more of the same role in each team if necessary. I tend to teach/demonstrate the activities and then let the students go and organise themselves. My year 9's loved it. You need to cut the cards to A5 size, I then laminate them, hole punch them and the students attach string and hang them around their necks while they are working.
I use this medals table with my GCSE PE group to help motivate them to work towards their target grade. I tend to use homework, end of units tests and practical work to give medals to and then chart them in the medals table.