The first transformative principle of this strategy is that, by giving your child responsibility, you are conveying your trust and confidence in her. Rather than making her do household chores as a punishment for bad behavior, you can convey that you are entrusting her with this project, which would be of great benefit to the family. You are framing your request as a reward. For example, if you catch your child engaging in good behavior, you can say that since she is showing so much improvement, you would like to give her the responsibility of a special project.
It is important to be thoughtful about the project you assign, and match the project to something that your child might enjoy. For example, you could give her something broken that could be fixed or at least tinkered with, if she likes that kind of task, or you could ask her to fold laundry or empty the garbage. The second transformative principle of this strategy is that it channels your child's energy, keeping her entertained and occupied in what will seem to her a meaningful activity. This will prevent her from getting in more trouble and will also be calming in itself, due to the sensory, concrete nature of the task.
Find out more about this book:The Gift of ADHD: How to Transform Your Child's Problems into Strengths