My 16 year old failed his random drug test. He tested positive for marijuana. I am so dissapointed. He was doing so good for so long and then gave into temptation. Right now he is grounded and we have taken his phone and other contact with the outside world. I am not really sure how to procede from here. We told him we would talk to him more about his consequences today. At this point I am thinking he stays grounded until he passes a drug test. And then test him more frequently with increasing consequences for repeat offenses. What do you ladies think. What would you do?