Behaviorism

I remember in my second grade class my teacher had a card system. The system had a green card, a yellow card and a red card. If the teacher told me to pull my card that means I had to pull my green card and put it behind my red card so that my yellow card was showing. The yellow card was the teacher giving me a warning, meaning that if i had to pull my card again that day then i would have to sit out of recess. I always remember being so upset when my teacher told me to pull my card. Looking back at this now I realize that this is an example of negative punishment because my teacher is taking something away because of my bad behavior. I have also realized that this was a very successful strategy to keep the class in order, especially me.