Tough laws and smart school programs can play an important role in reducing teen crashes, but their effects will be limited if parents aren't involved, say experts. The Centers for Disease Control and Prevention recently launched a "Parents Are the Key" campaign, urging adults to set good examples and discuss safe driving practices with kids. And many states require parents to certify that their teen has completed the required number of hours of supervised driving, says McCartt. Some advocacy groups work to educate parents about the laws in their state and develop parent-teen contracts that spell out the rules of the road for teenage driving. With good laws and guidance, the streets can be safer for everyone.