diff --git a/advlabdb/modelViews.py b/advlabdb/modelViews.py
index a4e38a9..c22770a 100644
--- a/advlabdb/modelViews.py
+++ b/advlabdb/modelViews.py
@@ -4,6 +4,7 @@ from flask_admin.menu import MenuLink
 from flask_admin.contrib.sqla.filters import BaseSQLAFilter
 from flask_security import hash_password
 from wtforms import BooleanField, SelectField, TextField
+from wtforms.validators import DataRequired, Email
 
 from advlabdb import admin, app, user_datastore, db
 from advlabdb.models import *
@@ -17,14 +18,19 @@ class UserModelView(SecureModelView):
     column_list = ["email", "active", "roles", "assistant"]
     column_searchable_list = ["email"]
     column_filters = ["active"]
-    form_columns = ["email", "roles"]
+    form_columns = ["email", "active", "roles"]
+
+    form_args = {
+        "email": {"validators": [Email()]},
+        "active": {"default": True},
+        "roles": {"validators": [DataRequired(message="A role is required!")]}
+    }
 
     def create_model(self, form):
         password = randomPassword()
         passwordHash = hash_password(password)
 
         email = form.email.data.lower()
-        print(form.roles.data[0].name)
 
         roles = [role.name for role in form.roles.data]
         if "admin" in roles:
@@ -50,7 +56,10 @@ class SemesterModelView(SecureModelView):
     }
 
     def after_model_change(self, form, model, is_created):
-        if is_created and form.create_parts.data:
+        if form.create_parts.data:
+            if is_created == False and model.parts != []:
+                flash("This semester already has parts!", "danger")
+                return
             for partLabel in partsLabels:
                 db.session.add(Part(label=partLabel, semester=model))
             db.session.commit()
@@ -61,20 +70,7 @@ class PartModelView(SecureModelView):
     column_details_list = ["label", "semester", "part_experiments", "part_students", "groups"]
     form_columns = ["label", "semester"]
 
-
-class PartFilter(BaseSQLAFilter):
-    def apply(self, query, value, alias=None):
-        return query.filter(self.column == partFromLabelInUserActiveSemester(value).id)
-
-    def operation(self):
-        return "equals"
-
-    def validate(self, value):
-        if partFromLabelInUserActiveSemester(value):
-            return True
-        else:
-            flash(f"Part {value} not found in your active semester {userActiveSemester()}!", "danger")
-            return False
+    form_choices = {"label": list(zip(partsLabels, partsLabels))}
 
 
 class StudentModelView(SecureModelView):
@@ -84,6 +80,10 @@ class StudentModelView(SecureModelView):
     column_searchable_list = ["student_number", "email", "first_name", "last_name"]
     form_columns = column_details_list + ["new_part_student_part", "new_part_student_group_number"]
 
+    form_args = {
+        "email": {"validators": [Email()]},
+    }
+
     partChoices = ["-"] + partsLabels
     form_extra_fields = {
         "new_part_student_part": SelectField("Part", choices=list(zip(partChoices, partChoices)), default=partChoices[0]),
@@ -132,8 +132,25 @@ class StudentModelView(SecureModelView):
             flash("Added part student.", "success")
 
 
+class PartFilter(BaseSQLAFilter):
+    def apply(self, query, value, alias=None):
+        return query.filter(self.column == partFromLabelInUserActiveSemester(value).id)
+
+    def operation(self):
+        return "equals"
+
+    def validate(self, value):
+        if partFromLabelInUserActiveSemester(value):
+            return True
+        else:
+            flash(f"Part {value} not found in your active semester {userActiveSemester()}!", "danger")
+            return False
+
+
 class PartStudentModelView(SecureModelView):
     column_filters = [PartFilter(PartStudent.part_id, "Part", options=list(zip(partsLabels, partsLabels)))]
+    form_excluded_columns = ["experiment_marks"]
+
 
 admin.add_view(StudentModelView(Student, db.session))
 admin.add_view(PartStudentModelView(PartStudent, db.session))
diff --git a/advlabdb/utils.py b/advlabdb/utils.py
index d62e02e..01d0f87 100644
--- a/advlabdb/utils.py
+++ b/advlabdb/utils.py
@@ -4,6 +4,7 @@ from flask_security import current_user
 from flask import flash
 
 from advlabdb.models import Semester
+from advlabdb import db
 
 def makeTable(headerAndDataList, rows, tableId="table"):
     def cellString(cell):