We Have a Tier 0 Problem

The Missing Layer of Childhood

The messages all sound different, but they rhyme.

A teacher in the U.S. writes, “My kids melt down over the tiniest things now. It’s like their frustration tolerance is paper-thin.”

A principal in the U.K. says, “We’re seeing more extreme behaviors at younger ages than ever before. We’ve rolled out three behavior systems in seven years, and it still feels like we’re always in crisis mode.”

A psychologist in Australia: “Executive function delays are everywhere. Attention, impulse control, emotional regulation. It’s not just one school - it’s the pattern.”

Different countries. Different curricula. Different acronyms.

Same question underneath:

“What on earth is happening to kids?!”

I don’t think the answer is “kids got worse” or “parents stopped caring” or “teachers forgot how to manage a classroom.”

I think the answer is a lot quieter and a lot more uncomfortable:

We have quietly dismantled the developmental conditions childhood used to provide automatically, and now we are living with the effects.

That’s all Play Deprivation Delay Theory (PDDT) really is. It’s my attempt to put language around the simple, painful pattern I see:

• First, we deprive kids of the kind of play that builds their brains and bodies.

• Then, we label and punish them for the delays that deprivation created.

• Finally, we blame the child, the parent, or the teacher instead of the conditions.

We tell ourselves we have a “behavior crisis.”

What we actually have is a Tier 0 crisis.

What I Mean by “Tier 0”

Most of us now teach inside some kind of tiered support framework.

You might call it MTSS or RTI or “school-based support” or something else entirely, but the picture is usually the same: a pyramid.

• At the base: “universal” supports for every student.

• In the middle: “targeted” supports for students who start to struggle.

• At the top: “intensive” supports for students with the biggest needs.

On paper, it’s beautiful. Lev Vygotsky would probably nod along: meet learners in their zone of proximal development, give them the right amount of scaffolding, adjust as they grow.

The problem is not the pyramid itself.

The problem is what the pyramid is standing on.

No system I’ve ever worked in has a named layer underneath all of that. There’s no line on the flowchart that says:

Tier 0: The world kids grow up in before we ever test, sort, or support them.
Includes: unstructured play, independence, real responsibility, rich conversation, neighborhood friendships, extended family, community life.

We just assume that layer is there.

Play Deprivation Delay Theory starts from the uncomfortable observation that in many places, it isn’t. At least not in the way it used to be. If you build a beautiful three-tier system on top of a childhood that has lost enormous amounts of real play, you shouldn’t be shocked when the whole structure starts to wobble.

We don’t just have a behavior problem.
We have a broken foundation problem.

The Childhood Our Systems Were Built For

Think of the childhood our current education system was designed around.

Not officially, on paper, but in the massive assumptions baked into it.

It assumes that by the time children arrive at school, they’ve had thousands of reps at things like:

• Waiting.

• Knowing how to work with others.

• Sharing space.

• Losing and not collapsing.

• Handling “no” without going nuclear.

• Figuring out what to do when you’re bored.

Now ask yourself and your school system: “Where, exactly, were they supposed to get those reps?”

Vygotsky had the clear answer: play. He found that for kids, play isn’t a break from development. It is the engine of development. Kids in his context spent huge stretches of their day in self-directed, imaginative, social play. That’s where he saw them stepping into roles they weren’t ready for yet, stretching themselves in that sweet spot just beyond their current abilities.

Peter Gray comes at it from a different angle but ends up in the same place. He shows, with actual trend data, how free, self-directed play has dropped over the last 50-60 years, while anxiety, depression, and learned helplessness in young people have climbed. These are not clean “cause-effect” lines, but they are disturbing overlaps.

Stuart Brown looks inside the brain and basically says, “Look, if this were any other mammal, we wouldn’t be surprised. You block that mammal’s ability to play? You get changes in emotional regulation, flexibility, and social understanding. Of course you do.”

In other words: play (real, messy, kid-led play) is supposed to be the primary classroom for everything we now call “self-regulation,” “executive function,” and “social-emotional skills.”

Our school systems were built assuming that classroom was still open and giving kids the crucial primary education they’ll need for school and beyond.

Photo by Sandra Seitamaa on Unsplash

The Childhood Kids Actually Have Now

Now zoom to 2025 and describe childhood honestly.

I don’t care which country you’re in, you will probably recognize at least some of this:

Less unsupervised outdoor time.
More time sitting.
Less mixed-age free play.
More organized sports and activities run by adults.
Less walking to the park or riding bikes alone.
More rides in the backseat, buckled in and strapped to a screen.
Less “Be back by dinner!”
Less kids playing outside until the streetlights come on.

And of course: screens. Phones, tablets, consoles, Chromebooks. Not evil…but almost. Not going away. But very, very good at eating the exact hours that used to belong to unstructured play and wandering and face-to-face conflicts and negotiations with friends. As Jon Haidt says, phones are “experience blockers.” He also has noticed that, “We’ve overprotected kids in the real world and under-protected them online.” That shows up in our classrooms every day. Kids who are terrified of climbing a slightly tall stump, but unfazed by algorithmic chaos and group chats on fire at midnight.

So ask the question again:

If play is the lab where kids practice frustration, negotiation, risk, communication, disappointment, and repair…and we quietly removed half their lab time, then why are we surprised their experiments are going so badly?

PDDT’s answer is: we shouldn’t be.

This is not a mystery. It’s a delayed effect.

First we changed the inputs of childhood.
Now we are seeing the outputs in school.

Photo by hessam nabavi on Unsplash

What “Delay” Actually Looks Like

When I say “delay,” I don’t mean kids are broken or doomed. I mean they are arriving at school less practiced in certain areas than we expect for their age.

It’s like we quietly moved the developmental goalposts and forgot to tell the adults.

So a five-year-old who cannot wait more than five seconds without erupting? That’s not a “bad five-year-old.” That’s a nervous system that has had very few reps at not getting what it wants immediately.

A seven-year-old who turns every group activity into WWIII is not necessarily a budding villain. They may simply have had more experience managing conflict through “close the app, start a new game” than through “stay in the same room and find a way to work it out.”

A nine-year-old who shuts down at the first hard task? That’s not a character flaw. It may be a child who has never had the chance to struggle through something optional and low-stakes like building a fort, learning a trick, perfecting a drawing, without an adult stepping in or a device offering an easy escape.

In other words, they’re not “behind” on some abstract moral timeline. They’re behind on crucial practice reps to build those cognitive muscles.

And school is where the mismatch becomes unbearable:

We ask kids to tolerate boredom, frustration, and effort after childhood was stripped of the earlier experiences that would have made those tolerable. Play Deprivation Delay Theory says: if we refuse to look at that mismatch, we will keep mislabeling delayed development as “noncompliance,” “disrespect,” or “disorder.”

How This Breaks Our Support Systems

Now put this into the tiered-systems picture.

At the universal level, we assume kids can:

• sit or stand in a group without constant crisis,

• share materials,

• wait a turn,

• lose small things (a game, a pencil, a spot in line) without totally unraveling.

When that assumption is wrong for large numbers of kids, everything else blows up.

Classroom teachers start sending referrals because they are living in constant fight-or-flight. It’s not one child who is wildly out of sync, it’s a dozen children who are a few inches off baseline all day long. Support teams start drowning because the “few kids who need extra help” are now…A LOT of kids.

And because we do not have Tier 0 on our flowchart, the only levers we see are:

• more programs,

• more points and charts,

• more targeted groups,

• more consequences.

We search for a Tier 2 or Tier 3 solution to a Tier 0 problem.

And that’s why so many educators tell me their systems feel like they’re always bailing water out of a sinking boat. The leak is not in the tiers and supports. The leak is in the hull of the boat.

“But Can’t We Just Teach Those Skills?”

This is usually where someone says, “Okay, so they missed some play. Can’t we just directly teach self-regulation and resilience? Like, with a really great SEL curriculum?”

I get the heart behind that. Schools need concrete things to do.

And yes, there is absolutely a role for modeling, language, explicit conversations, and practicing strategies together. Of course.

But here’s the catch: self-regulation and executive function grow the way resilience grows in literally every other system on earth - through repeated, real experiences that are just on the edge of what you can handle, with support nearby if needed.

That’s Vygotsky’s whole point. The zone of proximal development is not a worksheet; it’s a lived moment: this puzzle, this social problem, this challenge, right now, with just enough help.

Gray’s work on free play shows kids learning self-control because the game depends on it. If you hit every time you’re mad, nobody wants to play with you. If you hog the ball, the game falls apart. The feedback is immediate and social and profound, not a sticker at the end of the day.

Brown’s research suggests you can’t simply bolt play on later and expect the same outcomes. You can go to therapy, yes. You can heal, yes. But there is something uniquely powerful about those early, frequent, low-stakes reps of “I’m overwhelmed, I adjust, I recover, I return” inside play.

So yes, we can and should talk about feelings and coping and problem-solving.

But if the actual day-to-day ecology of childhood is still mostly:

• sitting,

• being told what to do,

• tapping on a screen,

• avoiding risk,

• worksheets

then those lessons are like trying to grow a tomatoes in a closet. You can tape pictures of sunshine to the wall. It will not change the fact that there is no sun.

So What Do We Do With This?

This is the part where I wish I could give you a three-step formula: “Just add forty minutes of outdoor play and stir!”

Real life is messier than that. Contexts are different. Constraints are real.

But PDDT points to a few concrete truths:

1. If we keep treating all behavior as a moral issue, we will miss the developmental story underneath.
   Kids are not good or evil. They’re at a certain level of development, inside a certain ecology of play, stress, and support. Development explains why it happened. Accountability and repair shape what happens next. We need both.

2. If we keep doubling down on higher tiers without rebuilding the foundation, we will stay exhausted and confused.
   We will keep asking “What’s wrong with kids?” instead of “What did society change about childhood?”

3. If we want different outcomes, we have to change the daily inputs.
   Less deprivation of free play. Fewer hours where kids’ eyes and nervous systems are swallowed by devices. More chances for kids to make choices and try age-appropriate activities in real-world space (such as the Let Grow Experience provides).

We need to intentionally offer:

More real play.
More trust and responsibility.
More “You can try this on your own.” and “We can figure this out.”
More bored afternoons that turn into something.

Call that Tier 0. Call it development. Call it childhood.

Just don’t call it optional.

A Different Starting Question

If you take nothing else from this post, let it be a different first question when a child’s behavior is breaking down.

Instead of leaping straight to:

“What’s wrong with this kid?”

or

“What consequence will fix this?”

Try:

“What chances has this child had to practice the thing I’m asking them to do right now?”

Where have they practiced waiting?
Where have they practiced losing?
Where have they practiced sharing?
Where have they practiced bouncing back from “no”?

If the honest answer is “almost nowhere,” then the story changes.

It doesn’t mean there are no boundaries.
It doesn’t mean anything goes.

It means we stop expecting a sturdy house where we’ve removed the foundation.

It means we stop calling it a behavior epidemic when, it’s a play epidemic.

And if that sounds bleak, I actually find it hopeful.

Because if the problem is that we deprived kids of something, then the solution is not buried in 400-page policy documents or superhuman teachers.

The solution is simply to give it back.

To rebuild Tier 0.

To put play, in all its unruly, inconvenient glory, back at the center of what it means to grow up.

And then watch what happens to everything we currently call “behavior.”