Points and progress bars are easy to hand out. We only mark a lesson mastered when the evidence says your child really knows it — and we check again the next day to be sure.
Every parent who's used a learning app has seen it: the streak is alive, the points are piling up, the progress bar is green — and then you ask one question at dinner and realize nothing stuck.
That's not a bad kid. That's a smart kid responding to a badly designed game. When an app rewards the score, kids optimize the score: click fast, guess in patterns, leave the tab open and walk away. The app celebrates; the learning never happened.
Cullinan is built the other way around. The reward isn't attached to finishing — it's attached to demonstrating. Here's exactly how.
Real focused time, not wall-clock time
Leaving a lesson open while watching YouTube doesn't count. Cullinan tracks whether the lesson tab is actually visible and in front — tab-switches and idle time are separated out. A lesson 'completed' with almost no focused time doesn't earn mastery.
Answer patterns get analyzed
Real kids read the question. Answers that come back faster than a human can read — or a suspicious streak of picking the same choice over and over — get flagged as clicking-through, not learning. Each attempt earns an integrity score, and low scores don't count.
Provisional first, verified later
Passing a lesson once makes mastery provisional. It only becomes verified when your child demonstrates the same material again at least 24 hours later, on a clean attempt. That's the difference between remembering it for ten minutes and actually knowing it.
Gamed attempts don't advance
When an attempt is flagged, the mastery simply isn't recorded — no XP, no streak, no moving on. The lesson stays in place for a genuine try. Your child sees the same normal encouragement either way; the flag is for your eyes only, by design.
'Mark complete' isn't mastery
Tapping 'mark complete' on the daily plan without opening the lesson is fine for chores — but it can never earn academic mastery on its own. The system caps those attempts well below the mastery threshold, always. Only demonstrated work counts.
The Activity view
Every attempt, every subject, every day — with focused minutes, tab-switches, and any integrity flag explained in plain English right on the row. No decoding required.
Nightly AI reports
Each evening, an AI-written report summarizes what each child actually did — and it's instructed not to flatter. If the day was light, it says so. If integrity signals suggest shortcutting, it calls that out specifically, so you hear it from the report before it becomes a habit.
Flags you can act on
A flag isn't an accusation — it's information. "Answered short-answer questions in under 3 seconds each" tells you exactly what happened, so the dinner-table conversation is about facts, not vibes.
Homeschool parents carry a quiet burden: when someone — a state reviewer, a co-op, a college admissions office — asks "how do you know they learned this?", the answer is usually "trust me."
Verified Mastery gives you a better answer. Behind every mastered lesson is a record: real focused minutes, a genuine scored attempt, and a second demonstration at least a day later. Your records aren't a stack of participation certificates — they're evidence. That's a transcript you can defend without flinching.
Nothing about the lesson changes for your child — no warnings, no red flags, no 'suspicious activity' popups. And to be clear about what this is: we don't record screens, cameras, or keystrokes. The system only looks at signals inside the lesson itself — how long questions took, whether the lesson tab was actually in front, answer patterns. It isn't surveillance; it's just making sure that when you see a green checkmark, it's true.
The lesson simply doesn't count as mastered — no XP, no streak credit, no advancing. It stays on your child's queue for a real attempt, and your child sees the same warm encouragement as always. You see the flag, in plain English, on your Activity page and in that night's report. What to do about it is your call — often it's just a tired kid rushing, and the fix is a conversation, not a punishment.
Honest answer: a determined kid can look up an answer on another device or ask a sibling, and no software on earth fully prevents that. But here's what makes it mostly pointless: mastery isn't confirmed until they demonstrate it again at least 24 hours later. Copied answers don't survive a next-day re-check — actually knowing the material does. Cheating buys a fake checkmark for one evening, then the material comes right back.
Time when the lesson tab is visible and the window is in front. If your child switches to YouTube in another tab, that time isn't counted as learning — even though the lesson is technically 'open.' Wall-clock time is easy to fake by walking away from the computer; focused time isn't.
No — an honest kid never encounters it. A child working normally never triggers a flag, never sees anything different, and their mastery verifies quietly in the background. The whole system only becomes visible (to you, not them) when the signals genuinely don't add up.
Start with the free adaptive placement, then watch mastery get earned — and verified — for real. 14-day free trial, no credit card. Built by a homeschool dad of five.