> ## Documentation Index > Fetch the complete documentation index at: https://help.zebrania.edu.pl/llms.txt > Use this file to discover all available pages before exploring further. # Joining a school and class > Class codes, QR codes, the join poster, and every refusal you can hit. There are two ways into Zebrania: an **invitation** issued to your address (see [Invitations](/en/invitations)), or a **code** the school shares more widely. This page is about codes. There are two kinds of code, and they are easy to confuse: | | School join code | Class code | | ------------------ | -------------------------------------- | ---------------------------------- | | **Who it's for** | Teachers and school staff | Parents enrolling a child | | **Where from** | A QR poster, usually in the staff room | Your child's homeroom teacher | | **What it grants** | Membership of the school | An enrolment request for one class | | **Validity** | **1 hour** from generation | No expiry | ## For parents: enrolling a child with a class code You get the class code from the homeroom teacher. The app walks you through three steps: "Enter your child's details in the form below", "Add the class code your teacher gave you", "The teacher will verify and approve the enrollment". Besides your child's name you enter a **PIN** — the **last 4 digits of your child's PESEL number**. It isn't a password; it lets the homeroom teacher confirm you're enrolling your own child: "PIN = last 4 digits of child's PESEL. The teacher will verify identity." ### What happens after you submit The enrolment is **not** approved instantly. It goes for review and holds one of three states, visible in your **My children** list: * **Pending** — awaiting a decision. That's all you'll see for now, and there's nothing further to do. * **Approved** — your child is in the class and you can book meetings. * **Rejected** — the request wasn't accepted. Contact the homeroom teacher. The decision is made by that **class's homeroom teacher**, or by the **secretary** or a **school administrator** — any of them can approve or reject. There is no promised turnaround: a person does this by hand, so it can take until the school's next working day. If it waits noticeably longer, nudge the homeroom teacher. ### Refusals when enrolling a child | Message | What happened | What to do | | -------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- | | "Class not found. Check the join link and try again." | The class code is wrong, or the link was truncated. | Ask the homeroom teacher for the code again. | | "Please enter a class code." | The field was left empty. | Enter the code. | | "PIN must be 4 digits" | The PIN is the wrong length. | Enter the last 4 digits of your child's PESEL. | | "This child is already enrolled by another parent. Ask them to send you a guardian invitation instead of enrolling again." | The other parent already enrolled this child. | Don't enrol again — ask for a [guardian invitation](/en/invitations#guardian-invitation). It's the same child record, not a second one. | ## For teachers and staff: joining a school ### The QR poster The school generates a single-page **A4 poster** carrying a QR code and puts it up in the staff room. You scan it with your phone, give your email, and you're in — account creation and joining happen in one go. **Anyone who already belongs to the school** can generate the poster, not just an administrator. The **QR-code poster** wizard, reached from your school's team page, has four steps: generate the code, add a message, review the poster, print and put it up. The code is valid for **one hour** from generation: "Join codes are valid for one hour after they are generated." Print the poster immediately after generating the code — a poster printed in the evening and put up the next morning carries a code that already expired. Within that window the code is multi-use: any number of teachers can join with it. The poster prints its expiry ("Code valid until …") — check it before you put it up. ### The code expired This is the most common thing to hit on this path, and it isn't a fault. The app says so plainly: **"This code has expired — sorry!"**, and below it: "Anyone at your school who already uses Zebrania can generate a new code — ask for one and scan again." You don't need to track down an administrator — any colleague already in Zebrania will do. The poster's own footer says the same: "Code expired? Anyone at your school already using Zebrania can generate a new one." You can also **create your account right away** without waiting for a fresh code — when one turns up, you join with a single click. If the code was never read at all you'll see: "No join code found. Scan the QR code again or ask for a new link." ### Ask to be added to the school When you can't get a fresh code, use **Ask to be added to the school**. The request goes to an administrator: "Request sent — a school admin will review it." Only a **school administrator** can act on it. If you see "Couldn't send the request. You may already be a member of this school", check your list of schools before trying again. ### Refusals when joining a school | Message | What happened | What to do | | ------------------------------------------------------------------------ | ---------------------------------------------------------------- | ------------------------------------- | | "This code has expired — sorry!" | More than an hour passed since generation. | Ask any school member for a new code. | | "No join code found. Scan the QR code again or ask for a new link." | The code never reached the app — usually a truncated link. | Scan again rather than retyping. | | "Couldn't join. The code may be invalid or expired — ask for a new one." | The code is unknown or lapsed. The app doesn't separate the two. | Ask for a new code. | | "Sign in or create an account to join this school." | Not a refusal — you're just not signed in. | Sign in and come back to this page. | Scanning a code again when you already belong to the school breaks nothing and does not create a second membership. ## Joining a class as a teacher Belonging to a school is not the same as being assigned to a class. You join a class separately, choosing your role: **subject teacher** (then you pick the subject) or **homeroom teacher**. ### Founders and school staff This path used to hold a trap worth naming. Whoever creates a school gets administrator and secretary permissions — but **not** a teacher role. Joining a class once required the teacher role, so **a founder could not join a class in their own school**. That's no longer so: if you belong to the school, joining a class grants you the teacher role along the way instead of turning you away. This applies equally to founders, administrators and secretaries. Membership of the school is still required. ### Refusals when joining a class | Message | What happened | What to do | | ----------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------- | | "You are not a member of this school, so you cannot join its classes. Ask a school admin to add you first." | You hold a class code but aren't a school member. This is the only permission-based refusal left. | Join the school first — by QR code or by request. | | "You are already assigned to this class." | The assignment already exists. | Nothing to do; the class is on your list. | | "This class already has a homeroom teacher. A class can only have one homeroom teacher." | Someone else is the homeroom teacher. | Join as a subject teacher, and leave changing the homeroom teacher to an administrator. | | "Please select a subject." | "Subject teacher" was chosen without naming a subject. | Pick a subject from the list. | | "This school has no subjects yet. Ask an admin to add one, or join as a homeroom teacher." | The school has no subjects defined. | Ask an administrator to add subjects. | | "Class not found. Check the join link and try again." | The class code is unknown. | Ask for a correct code. | Once you're in you'll see **"You joined the class"** and can set your availability — see [Events and availability](/en/teacher/events-and-availability). ## What next * Holding an invitation instead of a code? [Invitations](/en/invitations). * Can't sign in at all? [Getting started](/en/getting-started). * Something else broken? [Troubleshooting](/en/troubleshooting).