(David Bobb and Louise Dubé) - The kindergartners in classrooms this year are beginning a once-in-a-generation civic journey. They started school on the eve of the 250th anniversary of the Declaration of Independence. They will reach high school graduation age in 2038, as the nation marks the 250th anniversary of the Constitution’s ratification.

As we celebrate Civic Learning Week, March 9-13, we should think about what this means. If we are serious about sustaining the next 250 years of self-government, nothing is more important than ensuring that every student graduates with a deep understanding of our history, our principles, and their own responsibility as citizens. This critical work falls largely on civics and history teachers—often overlooked, too rarely celebrated, and yet indispensable to the survival of our democracy.

They are the quiet heroes of America’s 250th.

The founders were clear: liberty and learning, the theme of Civic Learning Week this year, go hand in hand. George Washington called for educating youth in the “science of Government” so they might become “guardians of the liberties of the Country.”

And yet civic knowledge is slipping. Recent national assessments show troubling declines in students’ understanding of U.S. history. Only a handful of states require a full year of high school civics. In many schools, civic learning is squeezed by competing priorities.

This erosion is not due to public indifference. Quite the opposite. Seventy percent of American adults support more civic education. The 250th anniversary of the Declaration is a chance to renew our commitment to teaching the principles that define American democracy: natural rights, equality, constitutional order, and the responsibilities that come with freedom. These ideas cannot remain abstract. They must live in classrooms and communities.

Many activities are underway to help teach these principles to young people in and out of the classroom. The Civic Star Challenge, an initiative that provides teachers with incentives and tools to bring the Declaration of Independence to life in the classroom, was launched at back to school time last year. It invites educators nationwide to celebrate the 250th not just with pride, but with creativity and purpose.

As America approaches its 250th birthday, we have a rare opportunity to rekindle civic knowledge in every classroom. Let’s seize it—and ensure that this generation graduates not only knowing our history, but prepared to shape our future.

Louise Dubé is the CEO of iCivics.org, and David Bobb is the President and CEO of the Bill of Rights Institute.