http://www.parenting-ed.org/handout3/Discipline%20and%20Intervention%20Strategies/grounding.htm Many parents use grounding as a discipline technique with their older children. However, when parents ground their children for long periods (e.g., several weeks or more) it often loses its effectiveness because there is typically little incentive for children to behave well during the grounding. Also, when parents ground children for a long period of time, they often give in and reduce the length of grounding because of the restraints it places on the whole family. When this happens, children learn their parents won't follow through with the grounding they impose.
The modified grounding procedure described below involves brief and intense grounding but the child is allowed the opportunity to earn his or her way off grounding by completing a job assignment. This technique is most appropriate for older children (e.g., 10-16 year olds).