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Terms of use

Last updated: 2 November 2026

These terms are the agreement between you and SEMBL AS. You agree to them when you make an account. If you use Sembl for a school or district, you agree that you are allowed to accept them on its behalf for anything it buys.

Our privacy policy explains how we handle personal data.

1. Who we are

SEMBL AS, organisation number NO 931 699 741 MVA
Stoknesvegen 15, 6008 Ålesund, Norway
admin@sembl.app

2. What Sembl is

Sembl is a library of maths tasks, tools, games and courses for teachers of children from Kindergarten to Grade 6, to use in planning and teaching. These terms cover the Sembl app. They do not cover Sembl Play at play.sembl.app.

3. Who may use it

You must be an adult to have an account. Accounts are for teachers and others who work with children.

A class may use Sembl with its teacher, under the teacher's account, and the teacher stays responsible for that use. Sembl has no student accounts, and you must not make one for a child.

4. Your account

You sign in with a code sent to your email, or with Google or Microsoft where offered. Keep access to that account safe, because whoever holds it can sign in as you. Tell us at once at admin@sembl.app if you think somebody else has used your account. Accounts are personal and may not be shared.

5. No information about children

You must not put a child's name, work, score or behaviour, or anything else that could identify a child, into Sembl. That includes titles, headings, typed words on a board, and searches. Sembl is not built or secured to hold it. If it happens, tell us and we will help you remove it.

6. Free use

A free account includes the open tools, free tasks and some things we offer on us, such as a certain number of premium tasks. What is free, and how much of it, can change.

7. The free trial

A trial gives you premium access for 14 days. It needs no card and nothing is charged when it ends. It simply stops. Each person may have one trial, and not after having a subscription. We keep a one-way hash of your address after deletion to apply this, as the privacy policy explains.

8. Subscriptions

A subscription gives you premium access for the period you paid for. The price, currency and period are shown before you pay, and Stripe takes the payment.

A subscription renews automatically at the end of each period, until you cancel. To cancel, write to admin@sembl.app and we will cancel it at Stripe. You keep access to the end of the period you have paid for. If the price is going to change, we tell you beforehand, in time for you to cancel.

If a payment fails, Stripe may try again, and access can end if it keeps failing.

When a plan or trial ends, your account and what you made stay yours. Playlists stay, and premium tasks in them show a padlock. Saved boards stay and can be opened, renamed and deleted, but not changed. Free features carry on.

If you buy as a consumer

If you are a person buying mainly for purposes outside a business of your own, you are a consumer, even if you use Sembl for your teaching job. Mandatory consumer law then applies whatever these terms say.

Refunds

Apart from those rights, what sections 15 and 18 say, and any other right the law gives you, we do not refund payments, including for part of a period or for a period you did not use.

9. Schools and districts

A school or district buys under the order or invoice agreed with us, which sets out the price, the number of teachers and the period. If that order conflicts with these terms, the order wins for that school. A school is not a consumer, so section 8's consumer rights do not apply to it, and its payments are not refunded.

A plan by invoice ends on its last day, unless renewed. Its teachers then carry on as free teachers, and what they made stays theirs. The team library closes while the plan is ended and comes back if the plan does.

If you give us teachers' addresses, you confirm that they are adults working for you, that you may give us their addresses, and that you will tell them, including pointing them to our privacy policy. We make their accounts ready, and they sign in themselves. We may email a teacher to say their school has added them.

A school's administrator, named by the school, can add and remove its teachers up to the number in its order. They see each teacher's email address, whether that teacher has signed in, and their name once they have. We do not give a school the contents of a teacher's private playlists, boards or progress.

10. What you make

What you make stays yours: your playlists, headings, boards and the puzzles you design. You give us permission to store, copy and display them so far as we need to run Sembl for you, and to show them to the people you choose to share them with.

Sharing. A playlist you share by link can be seen by anybody with the link. One shared with your team can be read and copied by its members, and a colleague's copy stays theirs. Only share what you are happy for them to see.

A class puzzle you send in. By sending one, you give SEMBL AS a permission that is worldwide, not exclusive, free of charge and has no end date, to show, print, copy and offer it to teachers and classes using Sembl. It carries on after you delete your account, with your name removed. We may decline, move or take down any puzzle without giving a reason. If you put your name on it, you agree to it being shown with the puzzle, and you may ask us to take it off at any time. Only ever use your own name.

You are responsible for what you make. You confirm that you have the right to use it, and that it does not break the law or anybody's rights. We may remove anything that does.

We will not make one of your boards or playlists into a Sembl original without asking you.

11. What we make

Tasks, tools, games, courses, words and pictures in Sembl belong to SEMBL AS or to the people who license them to us. Authors are credited on their work.

While you have access, you may use them to plan and teach your own classes, show them on your screens, and print copies for your own classes.

You must not:

Other people's material. Some tasks are hosted by others, such as Google, Canva, Mathigon, YouTube or Vimeo, and open from their sites, under their own terms. Standards text belongs to its publishers. Common Core State Standards, copyright 2010 National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.

12. Tasks and AI

Sembl's tasks are written by us or by the authors we credit. Some of ours are drafted with the help of an AI model, and staff decide what is published. We work hard to get the maths right, but mistakes can get through. You are the teacher: please check that a task suits your class. Tell us if you find a mistake.

13. Certificates

A certificate records the completion of a self-paced course. It is made by the person named, and Sembl does not check who did the work. It is not a qualification, and no outside body has approved or checked it. Whether it counts towards professional development hours is for your school, district or licensing body to decide.

14. Using Sembl fairly

Do not break the law with Sembl, harm it or its users, try to get into anything you have no permission for, overload it, or use it to send anything abusive or unlawful. If you find a security problem, please tell us and do not exploit it.

15. Changes to Sembl

We keep improving Sembl, and may change or withdraw tasks and features to improve them, to keep them secure, for a change in the law or a supplier, or because a licence ended. If a change materially reduces what a paying subscriber gets, we tell you beforehand. If you are a consumer, you may then end the subscription and get back what you paid for the time remaining.

We do not promise that Sembl will always be available. It may at times be down for repair or for reasons beyond our control.

16. Ending your account

You can stop using Sembl at any time. To delete your account, write to admin@sembl.app. We cancel any subscription of yours at Stripe first. Once an account is deleted, what was in it cannot be brought back.

We may suspend or close an account that seriously or repeatedly breaks these terms, or where the law requires it. Unless the matter is urgent, we tell you first and give you the chance to put it right.

17. Our responsibility to you

Nothing in these terms limits a right the law does not let us limit. That includes your rights as a consumer, and our responsibility for harm caused deliberately or by gross negligence, or for injury.

If you are not a consumer (section 8), such as a school or district, Sembl is provided as it is, and, so far as the law allows, we are not responsible for indirect loss, such as lost time or lost opportunity. Our total responsibility in any 12 months is limited to what you paid us in those 12 months.

18. Changes to these terms

We may change these terms for the same kinds of reason as in section 15. If a change matters, we tell you by email or in the app at least 30 days before it takes effect. If you do not agree, you may stop using Sembl and cancel before then. If you are a consumer and the change is to your disadvantage, you then get back what you paid for the time remaining.

19. The law and disputes

Norwegian law applies to these terms. Please write to us first, and we will try to sort it out. Otherwise a dispute goes to the Norwegian courts.

If you are a consumer, you also keep the protection of the mandatory law of the country where you live. Consumers in Norway may also turn to Forbrukertilsynet and Forbrukerklageutvalget for help.

20. Anything else

If part of these terms cannot be enforced, the rest still stands. If we do not act on something, we have not given up the right to. You may not hand your account or these terms to anybody else without our agreement. We may transfer them with the business, and your rights do not get worse as a result.