diff --git a/src/main/kotlin/edu/ntnu/idi/idatt/backend/notification/application/NotificationEventContextResolver.kt b/src/main/kotlin/edu/ntnu/idi/idatt/backend/notification/application/NotificationEventContextResolver.kt
index ad6af95b..2578e20e 100644
--- a/src/main/kotlin/edu/ntnu/idi/idatt/backend/notification/application/NotificationEventContextResolver.kt
+++ b/src/main/kotlin/edu/ntnu/idi/idatt/backend/notification/application/NotificationEventContextResolver.kt
@@ -22,6 +22,11 @@ data class StopNotificationContext(
     val stopTitle: String,
 )
 
+data class PupilNotificationContext(
+    val classroomTitle: String,
+    val pupilDisplayName: String,
+)
+
 /**
  * Resolves domain context needed to build teacher notification render arguments.
  */
@@ -75,6 +80,23 @@ class NotificationEventContextResolver(
         )
     }
 
+    fun resolvePupilContext(
+        classroomId: Long,
+        pupilUserId: Long,
+    ): PupilNotificationContext {
+        val classroom = classroomRepository.findById(classroomId)
+            .orElseThrow { ResponseStatusException(HttpStatus.NOT_FOUND, "Classroom not found") }
+
+        val pupilProfile = pupilProfileRepository.findById(pupilUserId).orElse(null)
+        val pupil = userRepository.findById(pupilUserId)
+            .orElseThrow { ResponseStatusException(HttpStatus.NOT_FOUND, "Pupil not found") }
+
+        return PupilNotificationContext(
+            classroomTitle = classroom.title,
+            pupilDisplayName = pupilProfile?.displayName ?: pupil.username ?: "Elev",
+        )
+    }
+
     /**
      * Serializes a small ordered key-value payload to JSON for frontend rendering arguments.
      *
diff --git a/src/main/kotlin/edu/ntnu/idi/idatt/backend/notification/application/TeacherNotificationEventListener.kt b/src/main/kotlin/edu/ntnu/idi/idatt/backend/notification/application/TeacherNotificationEventListener.kt
index a09addf3..024e9654 100644
--- a/src/main/kotlin/edu/ntnu/idi/idatt/backend/notification/application/TeacherNotificationEventListener.kt
+++ b/src/main/kotlin/edu/ntnu/idi/idatt/backend/notification/application/TeacherNotificationEventListener.kt
@@ -6,6 +6,7 @@ import edu.ntnu.idi.idatt.backend.shared.events.MapStopCompletedEvent
 import edu.ntnu.idi.idatt.backend.shared.events.PupilGameCompletedEvent
 import edu.ntnu.idi.idatt.backend.shared.events.PupilRecoveredFromStuckEvent
 import edu.ntnu.idi.idatt.backend.shared.events.PupilStuckThresholdReachedEvent
+import edu.ntnu.idi.idatt.backend.shared.events.InappropriateBehaviourEvent
 import org.springframework.stereotype.Component
 import org.springframework.transaction.event.TransactionPhase
 import org.springframework.transaction.event.TransactionalEventListener
@@ -146,6 +147,48 @@ class TeacherNotificationEventListener(
         )
     }
 
+    /**
+     * Materializes an inappropriate behaviour notification after a pupil attempts to write banned words.
+     *
+     * @param event committed inappropriate behaviour business event
+     */
+    @TransactionalEventListener(phase = TransactionPhase.AFTER_COMMIT)
+    fun onInappropriateBehaviour(event: InappropriateBehaviourEvent) {
+        val context =
+            notificationEventContextResolver.resolvePupilContext(
+                classroomId = event.classroomId,
+                pupilUserId = event.pupilUserId,
+                )
+        val threadKey = inappropriateBehaviourThreadKey(
+            event.classroomId,
+            event.pupilUserId,
+        )
+
+        notificationDeliveryService.deliverToClassroomTeachers(
+            NotificationDraft(
+                classroomId = event.classroomId,
+                pupilUserId = event.pupilUserId,
+                type = NotificationType.INAPPROPRIATE_BEHAVIOUR,
+                threadKey = threadKey,
+                renderCode = NotificationRenderCode.INAPPROPRIATE_BEHAVIOR,
+                renderArgsJson =
+                    notificationEventContextResolver.json(
+                        "classroomTitle" to context.classroomTitle,
+                        "pupilDisplayName" to context.pupilDisplayName,
+                        "input" to event.input,
+                        "context" to event.context,
+                    ),
+                payloadJson =
+                    notificationEventContextResolver.json(
+                        "classroomId" to event.classroomId,
+                        "pupilUserId" to event.pupilUserId,
+                        "input" to event.input,
+                        "context" to event.context,
+                    ),
+            ),
+        )
+    }
+
     companion object {
         /**
          * Stable thread key for stop-completion notifications for one pupil/stop/classroom tuple.
@@ -186,5 +229,19 @@ class TeacherNotificationEventListener(
             pupilUserId: Long,
             stopId: Long,
         ): String = "stuck:$classroomId:$pupilUserId:$stopId"
+
+
+        /**
+         * Stable thread key for inappropriate behavior notifications for one pupil/classroom tuple.
+         *
+         * @param classroomId classroom that scopes the notification thread
+         * @param pupilUserId pupil that has behaved inappropriately
+         * @return deterministic notification thread key
+         */
+        fun inappropriateBehaviourThreadKey(
+            classroomId: Long,
+            pupilUserId: Long,
+        ): String = "inappropriate:$classroomId:$pupilUserId"
     }
+
 }
diff --git a/src/main/kotlin/edu/ntnu/idi/idatt/backend/notification/domain/NotificationRenderCode.kt b/src/main/kotlin/edu/ntnu/idi/idatt/backend/notification/domain/NotificationRenderCode.kt
index 6ad487fb..7a561d27 100644
--- a/src/main/kotlin/edu/ntnu/idi/idatt/backend/notification/domain/NotificationRenderCode.kt
+++ b/src/main/kotlin/edu/ntnu/idi/idatt/backend/notification/domain/NotificationRenderCode.kt
@@ -10,4 +10,5 @@ enum class NotificationRenderCode(
     GAME_COMPLETED("notifications.game-completed"),
     PUPIL_STUCK("notifications.pupil-stuck"),
     WEEKLY_MYSTERY_SUBMITTED("notifications.weekly-mystery-submitted"),
+    INAPPROPRIATE_BEHAVIOR("notifications.inappropriate-behavior"),
 }
diff --git a/src/main/kotlin/edu/ntnu/idi/idatt/backend/notification/domain/NotificationType.kt b/src/main/kotlin/edu/ntnu/idi/idatt/backend/notification/domain/NotificationType.kt
index 6628c231..92f49cdb 100644
--- a/src/main/kotlin/edu/ntnu/idi/idatt/backend/notification/domain/NotificationType.kt
+++ b/src/main/kotlin/edu/ntnu/idi/idatt/backend/notification/domain/NotificationType.kt
@@ -8,4 +8,5 @@ enum class NotificationType {
     GAME_COMPLETED,
     PUPIL_STUCK,
     WEEKLY_MYSTERY_SUBMITTED,
+    INAPPROPRIATE_BEHAVIOUR,
 }
diff --git a/src/main/kotlin/edu/ntnu/idi/idatt/backend/shared/events/InappropriateBehaviourEvent.kt b/src/main/kotlin/edu/ntnu/idi/idatt/backend/shared/events/InappropriateBehaviourEvent.kt
new file mode 100644
index 00000000..aa0ac5ce
--- /dev/null
+++ b/src/main/kotlin/edu/ntnu/idi/idatt/backend/shared/events/InappropriateBehaviourEvent.kt
@@ -0,0 +1,13 @@
+package edu.ntnu.idi.idatt.backend.shared.events
+
+import java.time.Instant
+
+data class InappropriateBehaviourEvent(
+    val pupilUserId: Long,
+    val classroomId: Long,
+    val input: String,
+    val context: String,
+    override val occurredAt: Instant = Instant.now(),
+
+) : DomainEvent
+
diff --git a/src/main/resources/db/migration/V18__create_teacher_notifications_table.sql b/src/main/resources/db/migration/V18__create_teacher_notifications_table.sql
index 9c8a9a5f..84f6bf8e 100644
--- a/src/main/resources/db/migration/V18__create_teacher_notifications_table.sql
+++ b/src/main/resources/db/migration/V18__create_teacher_notifications_table.sql
@@ -7,7 +7,8 @@ CREATE TABLE teacher_notifications
     type            ENUM('MAP_STOP_COMPLETED',
     'GAME_COMPLETED',
     'PUPIL_STUCK',
-    'WEEKLY_MYSTERY_SUBMITTED'
+    'WEEKLY_MYSTERY_SUBMITTED',
+    'INAPPROPRIATE_BEHAVIOUR',
 ) NOT NULL,
     thread_key VARCHAR(255),
     active_thread_key VARCHAR(255),