036
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Issue #036October 9, 2026Jerry ChouEvidence Thinking

Schools Are Adopting AI With No Proof It Works. Your Child Needs This One Skill.

A Stanford University review of more than 800 academic papers found the evidence base for AI tools in K-12 classrooms is “extremely limited.” A controlled university experiment found grades dropped when students had access to a purpose-built AI tutor. Schools across the country are spending tens of thousands of dollars on AI tools anyway, without a shared way to measure whether any of it works. This issue covers the research, a skill called Evidence Thinking, and what families can do at home this week.

The Story Behind This Issue
Stanford University’s Center to Support Excellence in Teaching reviewed more than 800 academic papers on AI in K-12 classrooms and found the evidence base “extremely limited,” with no consensus on what metrics schools should track. A separate randomized controlled trial gave 2,379 college students access to a purpose-built GPT-4 AI tutor and found their final grades dropped by four percentage points. Engagement with course materials dropped even more sharply.
NPR reporter Lee V. Gaines documented how school districts across the United States are independently adopting AI tools with no state or federal policy framework guiding them. Districts in Ohio, Kansas, and New York are each navigating the question on their own, without shared metrics or evidence standards. Robin Lake of the Center on Reinventing Public Education called the situation “very Wild West in terms of the randomness.” Rebecca Winthrop of the Brookings Institution raised the risk of cognitive stunting for vulnerable students who interact with AI before their foundational skills are fully formed.
The Short Answer

Stanford University reviewed more than 800 academic papers on AI in K-12 education and described the research base as “extremely limited,” with no consensus on what metrics schools should track. A separate randomized controlled trial at the University of Maryland gave 2,379 students access to a purpose-built AI tutor and found final grades dropped by four percentage points. Schools across the country are adopting AI tools anyway, without state or federal policy guidance.

What this issue covers: Why schools are buying AI tools with no clear evidence they work, what happened when a university ran a rigorous experiment, and the one skill that protects families in a world full of confident but unverified claims about AI. The skill is called Evidence Thinking, and it applies far beyond AI. Plus The Proof Check, a 45-minute family game that practices the habit of asking for evidence before committing to any tool or approach.

Last month, a school district in Ohio renewed its contract for a $78,000 AI chatbot designed to help struggling students work through their emotions. When a reporter asked how they knew it was helping, the external evaluator said he could only get as far as “perception.” No hard data. No control group. Just a hopeful feeling. Stanford researchers who reviewed more than 800 academic papers on AI in classrooms described the evidence base for that kind of spending as “extremely limited.”[1][2] That finding changed the way I think about what my kids actually need to learn.

What’s Actually Happening

Schools across the country are adopting AI tools at speed, spending tens of thousands of dollars on programs with no proof they work and no shared way to measure whether they are helping.

Stanford University’s Center to Support Excellence in Teaching analyzed more than 800 academic papers on AI in K-12 classrooms and found the evidence base is “extremely limited.”[1] There is no consensus on what metrics schools should be tracking. Many existing studies rely on self-reported perceptions rather than hard learning outcomes. That has not stopped adoption. Districts are buying chatbots, AI tutors, and humanoid robots based on vendor promises and gut instinct, with no shared framework for evaluating what works.[2]

One of the clearest data points comes from a randomized controlled trial at the University of Maryland. Researchers gave 2,379 undergraduates access to a GPT-4-powered AI tutor connected to their actual course materials. They expected to see learning gains. Instead, students who had access to the AI tutor scored about four percentage points lower on final grades. Their engagement with course materials, measured by login activity and time on the platform, dropped nearly a full standard deviation.[3]

This was not a poorly designed product. It was a purpose-built tool reviewed by faculty, connected to real course content, and tested rigorously. When researchers looked at why it backfired, they found most students who used it were asking for answers, not guidance. And even students who never used the tutor showed reduced engagement with their coursework, possibly because knowing the shortcut existed changed how they approached studying in the first place.[4]

Why This Changes Things For Your Child

If schools cannot reliably evaluate whether AI tools are helping or hurting students, the responsibility for asking that question shifts to families.

Robin Lake, director of the Center on Reinventing Public Education, told NPR the situation “feels very Wild West in terms of the randomness.”[2] That characterization surprised me. Most parents I talk to assume schools are making careful, evidence-based decisions about what technology they introduce. The reality is that most are making judgment calls with limited data, significant vendor pressure, and no clear policy guidance from state or federal governments.

Rebecca Winthrop, a senior fellow at the Brookings Institution, said AI experimentation should not happen on vulnerable students without more evidence.[2] She raised the risk of cognitive stunting, the possibility that AI could reduce a child’s capacity to learn by doing their thinking for them before their foundational skills are formed. The University of Maryland study added a harder number to that concern: first-generation college students showed the largest grade losses when the AI tutor was available.[3][4]

When a university actually ran the experiment, grades went down, not up.

This matters for parents because most of us assume that if a school is using something, it has been vetted. That assumption is being tested in real time. Schools are not reckless. They are navigating something genuinely new with almost no guidance. But the gap between what AI tools promise and what they have proven is still wide, and your kid will encounter that gap in every classroom, every app, and every confident claim about what AI can do for them. They need a skill for it.

The Skill That Actually Matters Here

The skill is evidence thinking, the habit of asking “how do we know this actually works?” before trusting any tool, claim, or new approach.

This is not cynicism. Evidence thinking is not about assuming everything is a scam or deciding AI is bad. It is a genuine, curious question: what proof exists that this does what it says it does? Scientists ask it before publishing. Doctors ask it before prescribing. Investors ask it before committing. And children can learn to ask it too. In a world flooded with confident claims about new technology, the habit of asking for evidence is one of the most transferable skills a kid can build.

My middle daughter, who is nine, does something that quietly drives her older sister a little crazy. Before she tries anything new, she wants to know why. She will hold a new snack and say, “But does it actually taste good, or does the package just say that?” She is not being difficult. She is being appropriately calibrated. That natural instinct to ask “but how do we know?” is exactly what I want to help all three of my daughters develop more deliberately, because it applies far beyond snacks.

The useful thing about evidence thinking is that it works in every domain, not just AI. It applies to the study technique a teacher recommends, the app a friend says changed their life, the supplement that promises better focus. In a world where confident claims about technology arrive faster than research can evaluate them, the ability to ask for evidence, and to accept “we don’t really know yet” as a legitimate and honest answer, is one of the most practical habits a child can take into adulthood.

Signs Your Child Is Already Building This Skill

Your kid is developing evidence thinking when they ask what something is supposed to do before they try it, not after it has already become a habit.

Watch for the small moments. Does your kid ask a teacher why the class is using a new tool? Do they compare how they feel before and after trying something, even casually? When a friend says “this app is amazing,” do they ask what makes it amazing, or do they just download it? These might look like stubbornness or cautiousness. They are actually a child building the habit of checking before committing, which is the starting point for real evidence thinking.

A child who does not rush to adopt what everyone else is using is not a difficult child. They are a child who has begun to trust their own judgment over social pressure. In the context of AI, where new tools appear daily and most available “evidence” is marketing, this is exactly the habit that protects them. The kids who will navigate the next decade most effectively will not necessarily be the fastest adopters. They will be the ones who built the habit of asking whether something is actually working for them personally, not just in someone else’s account.

What You Can Do This Week

Have a “how do we know?” conversation with your child this week about one tool they already use, AI or otherwise.

Try the “Before We Try” test together. Pick any app, tool, or study technique your kid uses regularly and ask them two questions: What is this supposed to help you do? How would you know if it stopped working? You do not need a conclusive answer. The goal is to practice the question out loud. A ten-year-old who can articulate what a tool is supposed to do, and what evidence would change their mind about it, is already ahead of most adults in this department.

Send your school one question. If your kid’s school uses any AI tools in the classroom, send a short, friendly email asking how they measure whether it is effective. You are not challenging them. You are modeling the same behavior you want your kid to develop: thoughtful adults ask for evidence before they commit to something new. The school’s answer, whether a clear framework or an honest “we’re still figuring it out,” is worth knowing.

Name the habit this week. When your kid encounters a bold claim, a new app recommendation, or a teacher’s suggestion, ask them quietly: “How do we know this actually works?” Not as a gotcha. As a genuine, curious question you are both thinking through together. Practice it briefly and often. The more they run the question, the more naturally it surfaces when the stakes are higher.

This is not about teaching your kid to distrust technology. It is about teaching them to ask the same question every good scientist, doctor, and investor asks before committing to something new. That question does not require special knowledge. It is available to any child at any age. The earlier they learn it, the more uses they find for it.

The schools buying unproven AI tools are not bad actors. They are responding to the same pressure all of us feel: the world is changing fast, and waiting for perfect evidence feels like falling behind. But the gap between what AI promises and what it has proven is real. When one university ran a rigorous controlled experiment giving students access to a purpose-built AI tutor, grades went down, not up. That result is not an argument against AI. It is an argument for asking better questions before you trust it.

What I want my daughters to carry into that uncertainty is not fear and not enthusiasm on faith. It is the habit of asking one question: how do we know? A two-second gut check that changes how you evaluate every claim, every tool, every confident statement about what AI can and cannot do for you. Teach your kid that question and you have given them something no AI tool can generate on its behalf.

Sources
[1]Stanford Center to Support Excellence in Teaching. “The Evidence Base on AI in K-12 Education,” Stanford University, 2026.
[2]Lee V. Gaines. “Schools are experimenting with AI with little evidence or policy to guide them,” NPR, September 28, 2026.
[3]Jing Liu, Tracy Sweet, et al. “The Effects of Course-Integrated AI Tutoring on Student Performance and Engagement: A Randomized University Trial,” Annenberg Institute at Brown University, EdWorkingPaper: 26-1598, October 2026.
[4]Kathryn Palmer. “A University’s Research on Its Own AI Tool Raised More Questions Than Answers,” Inside Higher Ed, October 7, 2026.
This Weekend’s Family Activity

The Proof Check

Ages 8–1445 minutesGame
What You Need
Paper and pens for each playerScissors or a pen to make claim slipsA bowl or hat to hold the slipsThree colored cards or folded paper per person (green, yellow, red)A timer (phone works fine)
01
Step
Deal Out the Claims
Each family member writes down three tools or habits they use regularly, one per slip of paper. These can be AI-related (a chatbot, a voice assistant, an AI feature in a school app) or not (a study technique, a snack for focus, a morning routine). Fold the slips and put them in a bowl. Set one rule before starting: everyone must include at least one AI-related item. Mix the bowl. You are ready to play.
5 min setup
02
Step
Draw and Make Your Claim
Take turns drawing a slip. Read the tool or habit out loud and make a specific claim: “I use this because it helps me do X.” The claim has to be concrete. Not “it helps me generally” but “it helps me focus during homework” or “it makes me feel calmer before a test.” If someone draws their own slip, they keep it. The presenter has 60 seconds to make their best case.
10 min
03
Step
Ask the Three Proof Questions
The rest of the family asks these three questions in order, and the presenter answers each one. First: what is your evidence? Second: how would you know if it stopped working? Third: who wants you to believe this, and why? The presenter answers as honestly as they can. The family listens without interrupting or arguing. Save disagreements for the vote.
10 min
04
Step
Vote in Silence
Once the presenter finishes, every other family member holds up a colored card. Green means Strong Evidence. Yellow means Weak Evidence. Red means No Evidence. Everyone shows at the same moment, no lobbying first. After the reveal, each person explains their vote in one sentence. The presenter listens and takes notes but cannot argue back yet.
5 min
05
Step
Design the Test
After everyone has gone, the family picks the one item that received the most red and yellow cards. Together, design a simple three-day test: what will you track or observe, what would count as evidence the claim is true, and what would count as evidence it is not. Write it down on a shared sheet of paper. Whoever owns the item agrees to run the test this week and report back. A kid who can design a real test to check a claim they care about has the starting habit of a scientist.
15 min
If this gives you something useful to try with your kid this weekend, share it with another parent who is figuring this out too.
The Deeper Lesson

Why This Activity Works

Stanford University recently reviewed more than 800 studies on AI in schools and found almost no solid evidence that AI tools consistently improve student learning. Schools are adopting them anyway because the pressure to act is stronger than the pressure to ask first. The Proof Check gives your family a concrete way to practice the one question that protects them in any context: how do we know this actually works? When a kid designs a real test to verify a claim they care about personally, the habit becomes theirs. Not a lecture. Not a rule. A reflex they built themselves.

Conversation Starter

Ask This at Dinner

If your school started using a new AI tool in the classroom next month, what three questions would you want answered before you decided how much to trust it?

Listen for whether they can name a specific standard for what counts as proof. A kid who says “I would want to see actual test scores go up, not just what the company says” is already thinking like a scientist. A kid who says “I would want everyone to like it” is building a different standard. Both answers open the conversation that matters: where does your evidence come from, and how much would it actually take to change your mind?

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