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The first time you sign in, MESO asks you a handful of questions. It takes a couple of minutes, and two of the answers decide what you can plan afterwards. You will see six questions, or five if your browser cannot do passkeys — the welcome screen is not counted, because it is an invitation rather than a question.

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The screens, in order

1

Welcome to MESO

An introduction. Nothing to fill in.
2

What's your role?

Teacher, or another role in the school. This tailors what MESO shows you.
3

Where do you teach?

Your school.
4

What do you teach?

The one that matters most. Your subjects and year groups. These decide which curriculum specifications MESO plans against, so an incomplete answer here shows up later as a subject you cannot select.
5

How should MESO address you?

The name MESO uses when it talks to you.
6

Skip the password next time?

Optional. Sets up a passkey so you can sign in with your device instead of a password. Skipping it costs you nothing but convenience, and this screen is not shown at all on a browser that cannot do it.
7

How to work with MESO

Five short points about using AI responsibly in planning. Accepting them completes setup.

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What that last screen actually says

It is worth reading rather than clicking past, because it is the honest version of what MESO is and is not:
MESO drafts. You decide what reaches a classroom. Nothing it produces is ready to teach until a qualified teacher has read it.
Plans are drafted against NCCA specifications and learning outcomes, and MESO shows you which ones it used. Where it cites an outcome, verify the reference before you rely on it.
Dates, quotations, formulae and worked answers need checking. An AI system states an error with exactly the same fluency as a fact.
Never paste a student’s name, results, or personal circumstances into MESO.
Your account, plans and documents are stored in the EU. Generating a plan, and anything you type into MESO Assist, sends that text to the United States for processing. Nothing you write is used to train third-party models, and you can export or delete everything from Settings.

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Changing your answers later

Profile setup is optional and can be dismissed, and everything in it can be changed afterwards under Settings → Account → Profile. If a subject you teach is missing from a picker, that is the first place to look.