What Your Child’s Math Teacher Notices Before You Do

I taught math for about ten years. For most of them, I could usually tell when a family was coming apart before anyone said a word to me about it.

Not from a phone call or a parent meeting. From the homework, from my eyes, from my experience.

A child who always turned things in would start missing assignments, but only on certain days, and always the same days. A student who used to raise her hand went quiet. A grade would drift down without any drama, a B to a C to a D over time. A notebook would go missing, because the notebook was at the other house.

None of that ever showed up in a divorce agreement.

For a long time, I thought what those kids were short on was logistics: the right folder at the wrong house, the project nobody supervised, the permission slip that fell into the gap between two homes. And some of it was. But in the years since, nearly a decade as a therapist and now more than a decade as a mediator, I’ve come to read that missing worksheet differently. It was rarely the problem itself. It was a signal, a child telling me in the only language a child has, that something at home had gotten heavy.

Here’s the part that surprised me, and that surprises most parents: it usually wasn’t the divorce.

It’s the climate, not the structure

Decades of research on children and divorce keep arriving at the same finding, and it isn’t the one most parents brace for. What predicts how a child does isn’t whether their parents are married or divorced. It’s the level of conflict they live inside. A child in a calm two-home life tends to do well. A child in a tense, hostile one-home life often doesn’t, marriage certificate or not.

A recent study makes this plain. Researchers Karey O’Hara, E. Mark Cummings and Patrick Davies surveyed more than 1,000 adolescents, some living with married parents and some with divorced or separated parents, and published the results in Family Process in 2023. In both kinds of families, conflict between parents went hand in hand with teenagers feeling less emotionally secure and struggling more with anxiety and low mood. The pattern looked much the same whether the parents were married or apart. The kids from divorced homes were living with more conflict on average, and that, not the divorce itself, is where the risk sat.

Which means the question so many parents agonize over, should we stay together for the kids, is aimed at the wrong target. Staying isn’t what protects a child. A steady home is what protects a child. Sometimes that home has two parents in it and sometimes one, and children can do well in either. What they can’t easily do well inside is a house where the tension never resolves.

The house that thinks this isn’t about it

This is where I’d ask you to slow down, because there’s a version of this that hides in plain sight.

When people picture a home that’s hard on children, they picture yelling. Slammed doors, raised voices, the argument the neighbors can hear. But many of the homes that wear on a child aren’t loud at all. They’re silent. Cold. Two people moving through the same kitchen with no warmth between them, a dinner table where no one is unkind and no one is quite present either, a low current of contempt that never once becomes a scene.

Parents in those houses often reassure themselves that the children are fine, because nothing ever happens. Nothing is precisely what the child is registering.

The researchers who’ve studied this most closely found something counterintuitive: the silent kind is no easier on children than open conflict. A child can make sense of an argument. Hostility, at least, is legible. Withdrawal isn’t. When a parent goes cold and unavailable, a child often can’t tell what’s wrong, only that something is, and they tend to fill that silence with themselves.

This isn’t just a hunch from my classroom. In 2020, a team of researchers published a meta-analysis in Psychological Bulletin that pulled together 169 studies on how the relationship between parents affects children (van Eldik and colleagues). They looked at loud, hostile conflict, and they also looked at what they called disengaged conflict: withdrawal, shutting down, the cold shoulder. Across most areas of a child’s well-being, the quiet kind carried about as much risk as the loud kind. The cold house is not the safe house.

So, the quiet house is not the safe exception to any of this. It’s frequently the exact house that assumes this article isn’t about it.

None of which is a verdict on any parent. Ordinary marriages have cold weeks. Ordinary parents run out of patience. A child can weather a great deal when the overall climate is warm and the hard moments get repaired, and the research is careful about that distinction. What wears on children isn’t imperfection. It’s conflict with no resolution and no repair, whether it arrives as a shout or as a chill.

The Monday Morning Test

This is why, when I sit with two parents building a parenting plan, I ask a question that comes straight out of the classroom:

What does Monday morning look like for your child?

Walk me through it, specifically. Who wakes them. Whose house they’re in. Whether the backpack came too, and whether Sunday’s homework got done. Those logistics matter. But underneath them I’m listening for something else: is this child’s ordinary week steady? Is there a version of it, in one house or two, where they can stop bracing and just be ten?

A parenting plan can sort out overnights and holidays beautifully and still miss that entirely. It measures where a child sleeps. It rarely measures whether they feel safe there.

What I’d want you to take from this

If you’re somewhere in the middle of this, married and unsure, or already on your way out, I’d gently move your attention off the question that probably keeps you up. It was never really stay or go. Both can be done well, and both can be done badly. The work that actually protects your child is quieter and harder: lowering the conflict, warming the climate, and making sure that whatever shape the family takes next, the home inside it is steady.

That isn’t a legal question, which is why it so often goes unasked. It may be the most important one on the table.

Ask your mediator. Ask your attorney. Ask each other. What does Monday morning look like, and is it calm?

If you can’t answer that clearly yet, that isn’t a failure. It’s just the next thing to build.

Colleen O’Neil is a divorce mediator and the founder of Mediation and Beyond, working with families across Connecticut. She spent nearly a decade as a math teacher and nearly a decade as a therapist before training in divorce mediation at Quinnipiac University School of Law’s Center on Dispute Resolution. She is not an attorney and does not provide legal advice.

The Settlement Was Fair. It Just Didn’t Survive March.

Everyone fights over whether the split is even. Almost nobody checks whether it actually works.

Two people sat across from each other and did what everyone told them was the fair thing. They split it down the middle. Every account, every asset, cut clean in half. She kept the house; he took the equivalent in savings and retirement. On paper it was as even as a divorce gets. Both attorneys signed off. Everyone went home.

By March she was underwater.

Not because anyone cheated her. The house that looked like half the marriage on a spreadsheet came with a roof, a furnace, property taxes, and a mortgage she now carried by herself. His half sat in a retirement account he couldn’t touch without a penalty, so on paper he looked fine while his checking account ran thin. The number was fair. The arithmetic of living inside it was not.

I could see that kind of thing coming long before I ever mediated a divorce, because I spent about a decade teaching math. The thing I spent ten years trying to get across to teenagers turns out to be the same thing that quietly sinks divorce settlements: the number on the page and the number in the world are not the same number.

Fair is the easy test

Most people going through a divorce pour their energy into one question. Is the split fair? Is it even? Did I get my half? It’s the number everyone can see, so it’s the number everyone fights over. And it matters. But fair and durable are two different tests, and almost every agreement gets checked against the first and never against the second.

Start with the one that undoes people most often: a dollar is not a dollar. A million dollars in a house, a million in a retirement account, and a million in a savings account are three completely different things the moment you try to live on them. One you can’t spend without selling and moving. One you can’t touch for years without a penalty and a pile of rules. One is simply money. Split those “evenly” and one person can walk away asset-rich and quietly broke while the other walks away liquid, and both believe they got half.

Taxes are the second silent partner in every settlement. Two accounts worth the same on paper can hand two people very different bills a year later, depending on what’s owed on them. Retirement money moved or pulled the wrong way comes with penalties of its own. Spousal support isn’t taxed the way it was a decade ago. None of that shows up in the column that says “even,” which is exactly why a settlement can be evenly split and lopsided at the same time.

And then there’s the plainest arithmetic of all, the one everybody knows and nobody budgets for: two households cost more than one. Two rents or mortgages, two sets of nearly everything, a second bedroom for the kids. The same income that used to run one home now must stretch across almost two. A settlement built on last year’s single-household expenses is a settlement built to run out by spring.

What actually breaks

When a settlement comes apart financially, it almost never looks like a dramatic mistake. It looks like a $1,400 car repair there’s suddenly no cushion for. A tax bill nobody flagged. A furnace that dies in February. The braces. The agreement was fair. It just didn’t survive contact with one ordinary, expensive month.

And here’s why this sits with me as a mediator and not an accountant. A settlement that fails is the single most common thing that pulls two people back into conflict a year after they thought they were finished. They’re suddenly back in each other’s inboxes, back in front of lawyers, renegotiating and resenting. If there are children, those children are now living inside the exact tension the divorce was supposed to end. The money is never really a separate, colder topic. It’s often the thing that decides whether the peace holds.

What I’d want you to take from this

If you’re heading into this, by all means make sure the split is fair. But don’t stop there, because fair is the easy test. Before you sign anything, sit down with the real numbers, not last year’s, and walk through the first year of actually living it. What does the monthly budget look like in each household once this is real? Which assets can you spend, and when? Where is the cushion? And what happens the month something breaks?

Ask your attorney. Ask a financial professional. Ask your mediator. Not just “is this even,” but “does this survive March?”

If nobody in the room can answer that yet, that isn’t a reason to panic. It’s just the next thing to build.

Colleen O’Neil is a divorce mediator and the founder of Mediation and Beyond, working with families across Connecticut. She spent nearly a decade as a math teacher and nearly a decade as a therapist before training in divorce mediation at Quinnipiac University School of Law’s Center on Dispute Resolution. She is not an attorney and does not provide legal or financial advice.