diff --git a/advlabdb/models.py b/advlabdb/models.py
index 445ebba..67bdd0a 100644
--- a/advlabdb/models.py
+++ b/advlabdb/models.py
@@ -203,6 +203,7 @@ class GroupExperiment(db.Model):
     # An experiment specified to a group
     id = db.Column(db.Integer, primary_key=True)
     note = db.Column(db.Text, nullable=True)
+    experiment_marks_missing = db.Column(db.Boolean, default=False, nullable=False)
 
     semester_experiment_id = db.Column(db.Integer, db.ForeignKey("semester_experiment.id"), nullable=False)
     semester_experiment = db.relationship("SemesterExperiment", back_populates="group_experiments")
@@ -238,6 +239,14 @@ class GroupExperiment(db.Model):
         for partStudent in group.part_students:
             db.session.add(ExperimentMark(part_student=partStudent, group_experiment=self))
 
+    def update_experiment_marks_missing(self):
+        for experiment_mark in self.experiment_marks:
+            if experiment_mark.final_part_mark is None:
+                self.experiment_marks_missing = False
+                return
+
+        self.experiment_marks_missing = True
+
 
 class Experiment(db.Model):
     id = db.Column(db.Integer, primary_key=True)