Start by going to magma.se and click Skapa konto (Create account) at the top right corner, or go to app.matteappen.se and click Skapa ett här (Create account here) at the bottom of the screen.
You can either create your account with Google, Microsoft, Skolfederation or with användarnamn och lösenord (username and password).
Then choose Lärare, this means that you're going to be creating a Teacher account.
If you choose username and password, fill in your login information:
First name
Last name
E-mail
Password
Lastly, choose Land (Country), Kommun (Municipality), and Skola (School).