diff --git a/advlabdb/adminModelViews.py b/advlabdb/adminModelViews.py
index bcb1c4d..7283fc9 100644
--- a/advlabdb/adminModelViews.py
+++ b/advlabdb/adminModelViews.py
@@ -49,7 +49,9 @@ from advlabdb.exceptions import DataBaseException, ModelViewException
 from advlabdb.independent_funs import randomPassword
 from advlabdb.models import (
     MAX_MARK,
+    MAX_YEAR,
     MIN_MARK,
+    MIN_YEAR,
     Admin,
     Appointment,
     Assistant,
@@ -98,15 +100,12 @@ class UserView(SecureAdminModelView):
         def semesterQueryFactory():
             return Semester.query
 
-        def activeSemesterDefault():
-            return userActiveSemester()
-
         email = StringField("Email", validators=[DataRequired(), Email()])
         roles = QuerySelectMultipleField(
             "Roles",
             query_factory=roleQueryFactory,
             validators=[DataRequired()],
-            default=[Role.query.filter(Role.name == "assistant").first()],
+            default=[user_datastore.find_role("assistant")],
         )
 
         first_name = StringField("First Name", validators=[DataRequired()])
@@ -130,7 +129,7 @@ class UserView(SecureAdminModelView):
             query_factory=semesterQueryFactory,
             allow_blank=True,
             blank_text="-",
-            default=activeSemesterDefault,
+            default=userActiveSemester,
             description="Not fixed and users (including assistants) can change it.",
         )
 
@@ -266,21 +265,26 @@ class RoleView(SecureAdminModelView):
 
 class SemesterView(SecureAdminModelView):
     class CreateForm(Form):
-        def labelDefault():
+        def defaultFormLabel():
             if userActiveSemester().label == "WS":
                 return "SS"
             else:
                 return "WS"
 
-        def yearDefault():
+        def defaultFormYear():
             activeSemester = userActiveSemester()
             if activeSemester.label == "WS":
                 return activeSemester.year + 1
             else:
                 return activeSemester.year
 
-        label = RadioField("Semester", choices=["WS", "SS"], validators=[DataRequired()], default=labelDefault)
-        year = StringField("Year", validators=[DataRequired()], default=yearDefault)
+        label = RadioField("Semester", choices=["WS", "SS"], validators=[DataRequired()], default=defaultFormLabel)
+        year = IntegerField(
+            "Year",
+            validators=[DataRequired(), NumberRange(MIN_YEAR, MAX_YEAR)],
+            default=defaultFormYear,
+            description=f"Between {MIN_YEAR} and {MAX_YEAR}",
+        )
         transfer_parts = BooleanField(
             "Transfer parts",
             description="This option transfers the parts you have in your current active semester. Make sure that your semester is the last semester before creating a new one (recommended)!",
@@ -713,7 +717,7 @@ class SemesterExperimentView(SecureAdminModelView):
 
         oral_weighting = DecimalField(
             "Oral weighting",
-            validators=[DataRequired(), NumberRange(min=0, max=1)],
+            validators=[DataRequired(), NumberRange(0, 1)],
             default=0.5,
             description="Between 0 and 1",
             places=2,
@@ -721,7 +725,7 @@ class SemesterExperimentView(SecureAdminModelView):
         )
         protocol_weighting = DecimalField(
             "Protocol weighting",
-            validators=[DataRequired(), NumberRange(min=0, max=1)],
+            validators=[DataRequired(), NumberRange(0, 1)],
             default=0.5,
             description="Between 0 and 1. Oral and protocol weightings have to add to 1! Both are rounded to 2 decimal digits.",
             places=2,
@@ -729,7 +733,7 @@ class SemesterExperimentView(SecureAdminModelView):
         )
         final_weighting = DecimalField(
             "Final weighting",
-            validators=[DataRequired(), NumberRange(min=0, max=1)],
+            validators=[DataRequired(), NumberRange(0, 1)],
             default=1.0,
             description="Between 0 and 1",
             places=2,
@@ -1277,12 +1281,12 @@ class ExperimentMarkView(SecureAdminModelView):
     class EditForm(Form):
         oral_mark = IntegerField(
             "Oral Mark",
-            validators=[NumberRange(min=MIN_MARK, max=MAX_MARK), Optional()],
+            validators=[Optional(), NumberRange(MIN_MARK, MAX_MARK)],
             description=f"Between {MIN_MARK} and {MAX_MARK}",
         )
         protocol_mark = IntegerField(
             "Protocol Mark",
-            validators=[NumberRange(min=MIN_MARK, max=MAX_MARK), Optional()],
+            validators=[Optional(), NumberRange(MIN_MARK, MAX_MARK)],
             description=f"Between {MIN_MARK} and {MAX_MARK}",
         )