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Millions of Students Now Start School Later—So Why Can't We Count Them?

6/18/2025

 
by Terra Ziporyn, PhD
Picture
One of the first questions people ask about school start times is deceptively simple: How many districts have moved to healthier hours? It sounds like the kind of thing we should be able to answer with a clean number, a neat chart, or a tidy national map. But we can’t — and the reasons why say a lot about how education works in this country.

There is no national database. No federal reporting requirement. No consistent state‑level tracking. Districts can change schedules quietly, sometimes partially, sometimes temporarily, and sometimes only for certain schools or grades. Some shift by ten minutes, others by an hour, and many don’t announce the change in any way that’s searchable. Even when we know a district has changed, it’s often unclear when, how, or for whom.

And because the U.S. has nearly 14,000 school districts—each with its own calendar, politics, and communication habits—the picture is always incomplete. What we have instead is a patchwork: media reports, advocacy updates, scattered state data, and the stories families and educators share with us directly. Enough to see the momentum, but never enough to produce the simple number everyone wants.

The absence of a clean tally doesn’t mean the movement is small or that there aren't other excellent ways to assess it. It means the system isn’t built to track change of this kind—even when that change is widespread, accelerating, and deeply consequential for kids’ health and safety.

In the full piece, I explain why the question has no straightforward answer, what we can say with confidence, and what this lack of data reveals about the broader landscape:

Read the Full Article at https://terraziporyn.substack.com/p/how-many-schools-have-moved-start
​Terra Ziporyn is Start School Later's Executive Director and Co-Founder

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  • About Us ⮟
    • Mission and Goals
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      • Board of Directors
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    • 990
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      • Sleep Education >
        • Let's Sleep!
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        • Sleep Calculator
        • Workshops and Webinars
    • Implementation Consulting
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      • Sign Our Petition
  • Teen Stories
  • Learn More ⮟
    • School Start Times >
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