Walk the learner's screens, page by page.
Every screen below mirrors the real interface — the dashboard, the course page, a lesson with its tutor, teaching a simulated student, an Active PDF, the Learning Twin, your notebook, a facilitated discussion, and an oral defense. Scroll page by page and take each screen's mini-tour at your own pace.
AI student: Nine screens, one at a time. Press “Tour this screen” and follow the highlight — each stop is the part of the page that does the work.
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Your dashboard
The first screen after login: your shelf, your numbers, one click back into the module you were reading — and a quick menu on every page.
Learner Mode
Welcome back, Maya.
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Continue Reading
1 courseIntroduction to Cell Biology
How cells turn fuel into work — and what happens when they can't.
Organic Chemistry I
Carbon, bonds, and why structure decides behavior.
02 / 09
The course page
Each course is a structured set of modules — expand a module, open its lessons, and chat with the tutor attached to it.
Introduction to Cell Biology
Your Progress
Your Learning Twin builds from every lesson and quiz — see it on your Twin page.
Cellular Energy
AI Tutor03 / 09
Inside a lesson
Read, ask, complete: the lesson content, the completion rail, and a hints-only tutor that grounds every answer in your course materials.
← Back to Course · Module 3 · Lesson 2 of 3
Electron transport chain
The electron transport chain is a series of protein complexes embedded in the inner mitochondrial membrane. Electrons pass from NADH through several carriers, and the energy released pumps protons across the membrane — the gradient that powers ATP synthesis.
Oxygen's role is easy to misread: it does not create energy — it keeps the chain flowing by accepting electrons at the very end.
Finish the lesson
Answer every embedded question first — then mark the lesson complete.
Next: Quiz: Cellular energy · 10 min
Why does the chain need oxygen at all?
Here's a hint: think about what happens to the proton gradient if nothing accepts the electrons at the end…
Ch. 7 · Oxidative phosphorylation04 / 09
Teach a simulated student
Teaching is the strongest way to learn: explain the lesson to a simulated AI student that keeps asking questions — with instant feedback every round and a final misconception report at the end.
Simulated student
Teach-back · Lesson 2 · Electron transport chain
AI Student
I'm ready to learn about the electron transport chain! Why does it need oxygen at all?
Oxygen sits at the END of the chain — it accepts the electrons so the whole line keeps moving. Without it, everything backs up and no ATP gets made.
AI Student
"Backs up"? What exactly is flowing along the chain, then?
Instant round feedback
Passed4 / 5
Coverage
4 / 5
Clarity
5 / 5
Accuracy
"Strong explanation of oxygen's role — your twin records this as independent evidence for the concept."
Final report at the end: every misconception you raised, each with its correction.
05 / 09
Active PDF
Your reading, interrupted — in a good way: a ? badge pins beside the passage each question tests. Click it to jump to the question; click the quoted text to jump back to the passage.
Active PDF · Chapter 7 · 1 of 2 questions answered
Page 3 · Reading
The electron transport chain transfers electrons through a series of complexes; oxygen serves as the terminal electron acceptor, forming water. Without oxygen, the chain stalls and the cell must ferment to survive.
A ? badge pins beside the passage it tests — click it to open the question.
“…the chain stalls and the cell must ferment to survive.”
Which complex accepts electrons from cytochrome c?
Correct — complex IV reduces O₂ to water.
Answer every question to finish the lesson — required ones must be correct.
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My Twin
A private model of what you know: mastery bands, misconceptions you can dismiss, and a weekly plan that adapts — everything visible to you.
My Twin — Introduction to Cell Biology
Concept mastery
Three evidence kinds: what you met, what you solved with help, and what you can do unaided — the twin tells you what it hasn't checked yet.
Misconceptions
Dismiss any you disagree with — the tutor probes the rest.
This week's plan
Re-test oxidative phosphorylation — unaided, no hints.
Transparency: this page shows everything the Twin stores about you — your teacher only ever sees class-level aggregates.
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Notebook + Ask AI
Select or paste any passage into your module notebook — then ask questions grounded in your own notes and the course materials.
Lesson 2 · Reading
The chain couples electron transfer to proton pumping. Each complex hands electrons to the next until oxygen accepts them. The gradient then drives ATP synthase.
Select or copy any passage — it lands in your notebook, ready to ask about.
Oxygen = terminal acceptor. Without it the chain stalls → fermentation. Gradient powers ATP synthase.
What did I note about oxygen's role?
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AI discussions
Structured peer conversations with an AI facilitator that keeps them evidence-based — and a running summary for anyone joining late.
Lab report peer review
Facilitated discussionAI Facilitatorkeeps the thread evidence-based
Share one claim from your report and the evidence behind it — then challenge each other's methods, not motives.
Maya· 14:02
Claim: the gradient — not oxygen directly — powers ATP synthesis. Evidence: the pH experiment from module 3.
Jonas
But oxygen "powers" it in a sense — without it everything stops?
Good tension — Maya, can you separate the flow from the fuel? Cite the passage you're basing that on.
Summary for late joiners
The group separated electron flow from oxygen's role as terminal acceptor; two claims still need cited evidence.
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Assignments with AI defense
Submit your work, then defend it against an AI examiner — the conversation is graded against a threshold, clamped, and recorded.
Assignment · Lab report
SubmittedPass threshold: 70% · the AI examiner grades the conversation, and every grade is recorded server-side.
AI Examiner
I've read your lab report. Defend your conclusion: why is the electron transport chain oxygen-dependent, and what happens to ATP when it isn't?
Without oxygen as the terminal acceptor, NADH can't be recycled — the gradient collapses and ATP synthase stops.
Right mechanism. One more: where exactly does the gradient sit?
Est. 78% — on track to pass