a modern day Mary poppins saying parenting is in crisis. The nanny, Emma Jenner is author of a new book called keep calm and parent on. Deborah Roberts has the story. Are you down with the pizza. You... See More
a modern day Mary poppins saying parenting is in crisis. The nanny, Emma Jenner is author of a new book called keep calm and parent on. Deborah Roberts has the story. Are you down with the pizza. You have left table. To me, that says you're done. Come on, Jordan. Reporter: Sound familiar? I was ding myself a favor. If they eat, they eat, if they don't, they don't. Reporter: Emma Jenner is a modern-day Mary poppins. A proper English nanny. After years in the home trenches, she says in a new book, "Keep calm and parent on" that modern parenting is in crisis. First problem, fear. You say we're afraid of our children. How so? If a child is about to have a tantrum, a lot of moms, I see fear in the body language, their face. Kids are clever. They know, gosh, if I throw a tantrum, my mom will give me what I want. That's what they do. Reporter: She says we allow bad behave your because we have lowered expectations. The iPad is a shot cut parents shouldn't be taking. What do they do then? You have to show them how to behave. If day don't, you say, we're leaving. We're leaving because you're not going the ruin it for everyone from T in the restaurant. You leave. Reporter: Worse, we have lost the village. These day parents don't want to get involved in other people's troubles. I'm always looking for better ways to parent. Having someone here to observe and kind of guide us and point us in the right direction, that's great. I wish I could have that all the time. In fact, can you move in. Because I have a spare room. Reporter: Emma says there is hope. If parents are willing to set clear boundaries, stand firm, and remind their children who is boss. And one more thing. After 17 years of caring for other kids. Emma's having a baby. Are you going to remember to put yourself first? Are you going to practice what you preach? I am. I am indeed. At least I hope so. Reporter: We'll see if Emma can walk that talk when she answers to the word mom. She's worked with hundreds of kids and their parents. She insists discipline doesn't have to be a negative word. Putting yourself ahead of your children is not such a bad idea. They need to know you have a life, too. You're a person too. This is a story I want to see a followup on. Two to three days Yorks can change some of those habits. Good advice.
This transcript has been automatically generated and may not be 100% accurate.