diff --git a/templates/objectives/skills/details.html b/templates/objectives/skills/details.html
index 5858711df9..1e3722700d 100644
--- a/templates/objectives/skills/details.html
+++ b/templates/objectives/skills/details.html
@@ -6,21 +6,56 @@
         <h3 class="mb-0">{{ skill.short_label }}</h3>
         <h4 class="card-title"> {{ skill.notation }}</h4>
     </div>
-    <div class="card-body pt-0 pb-0 mb-0">
+    <div class="card-body pb-0 mb-0">
         <div class="row mr-1 ml-1 pb-0 mb-0">
             <div class="col-md-6">
-                <h4 class="mb-1">Détails</h4>
+                <!-- <h4 class="mb-1">Détails</h4> -->
                 <div class="row">
-                    <div class="col-6">
-                        <p>Notation : <a href="#">{{ skill.notation }}</a><br />
-                        Age girl : <a href="/skill/difficulty/exact/{{ skill.difficulty }}">{{ skill.age_girl }}</a><br />
-                        Age boy : <a href="{% url 'skill_listing_by_key' 'level' 'exact' skill.level %}">{{ skill.age_boy }}</a>
-                        </p>
+                    <div class="col-3 text-center">
+                        <p>Notation : <a href="#">{{ skill.notation }}</a></p>
                     </div>
-                    <div class="col-6">
-                        <p>Difficulty : <a href="/skill/difficulty/exact/{{ skill.difficulty }}">{{ skill.difficulty }}</a><br />
-                        Level : <a href="{% url 'skill_listing_by_key' 'level' 'exact' skill.level %}">{{ skill.level }}</a><br />
-                        Rank : <a href="{% url 'skill_listing_by_key' 'rank' 'exact' skill.rank %}">{{ skill.level }}</a></p>
+                    <div class="col-3 text-center">
+                        <p>Difficulty : <a href="/skill/difficulty/exact/{{ skill.difficulty }}">{{ skill.difficulty }}</a></p>
+                    </div>
+                    <div class="col-3 text-center">
+                        <p>Level : <a href="{% url 'skill_listing_by_key' 'level' 'exact' skill.level %}">{{ skill.level }}</a></p>
+                    </div>
+                    <div class="col-3 text-center">
+                        <p>Rank : <a href="{% url 'skill_listing_by_key' 'rank' 'exact' skill.rank %}">{{ skill.level }}</a></p>
+                        <!-- Age girl : <a href="/skill/difficulty/exact/{{ skill.difficulty }}">{{ skill.age_girl }}</a><br /> -->
+                        <!-- Age boy : <a href="{% url 'skill_listing_by_key' 'level' 'exact' skill.level %}">{{ skill.age_boy }}</a> -->
+                    </div>
+                </div>
+                <br />
+                <div class="row">
+                    <div class="col-12">
+                        <table class="table table-striped table-condensed" data-sort="table" id="skill_age_table">
+                            <thead>
+                                <th></th>
+                                <th>With help</th>
+                                <th>Without help</th>
+                                <th>Chained</th>
+                                <th>Masterised</th>
+                            </thead>
+                            <tbody>
+                                <tr>
+                                    <td>Girl</td>
+                                    <td><a href="#">{{ skill.get_age_girl_with_help_display }}</a></td>
+                                    <td><a href="#">{{ skill.get_age_girl_without_help_display }}</a></td>
+                                    <td><a href="#">{{ skill.get_age_girl_chained_display }}</a></td>
+                                    <td><a href="#">{{ skill.get_age_girl_masterised_display }}</a></td>
+                                </tr>
+                                <tr>
+                                    <td>Boy</td>
+                                    <td><a href="#">{{ skill.get_age_boy_with_help_display }}</a></td>
+                                    <td><a href="#">{{ skill.get_age_boy_without_help_display }}</a></td>
+                                    <td><a href="#">{{ skill.get_age_boy_chained_display }}</a></td>
+                                    <td><a href="#">{{ skill.get_age_boy_masterised_display }}</a></td>
+                                </tr>
+                            </tbody>
+                        </table>
+                        <!-- Age girl : <a href="/skill/difficulty/exact/{{ skill.difficulty }}">{{ skill.age_girl }}</a><br /> -->
+                        <!-- Age boy : <a href="{% url 'skill_listing_by_key' 'level' 'exact' skill.level %}">{{ skill.age_boy }}</a> -->
                     </div>
                 </div>
                 <br />
diff --git a/templates/objectives/skills/list.html b/templates/objectives/skills/list.html
index d2cf968031..1e2b4124fd 100644
--- a/templates/objectives/skills/list.html
+++ b/templates/objectives/skills/list.html
@@ -26,8 +26,8 @@
                         <tr role="row" class="{% cycle 'odd' 'even' %}">
                             <td class="text-left">&nbsp;<a href="{% url 'skill_details' skill.id %}">{{ skill.long_label }}</a></td>
                             <td class="text-left"><a href="{% url 'skill_details' skill.id %}">{{ skill.short_label }}</a></td>
-                            <td class="text-right">{{ skill.age_girl }}</td>
-                            <td class="text-right">{{ skill.age_boy }}</td>
+                            <td class="text-right">{{ skill.age_girl_without_help }}</td>
+                            <td class="text-right">{{ skill.age_boy_without_help }}</td>
                             <td class="text-center">{{ skill.notation }}</td>
                             <td class="text-center">{{ skill.difficulty }}</td>
                             <td class="text-center">{{ skill.level }}</td>
diff --git a/ultron/objective/admin.py b/ultron/objective/admin.py
index a5b85af147..48f3493a96 100644
--- a/ultron/objective/admin.py
+++ b/ultron/objective/admin.py
@@ -39,8 +39,14 @@ class SkillAdmin(ForeignKeyAutocompleteAdmin):
         "notation",
         "simplified_notation",
         "is_competitive",
-        "age_boy",
-        "age_girl",
+        "age_boy_with_help",
+        "age_boy_without_help",
+        "age_boy_chained",
+        "age_boy_masterised",
+        "age_girl_with_help",
+        "age_girl_without_help",
+        "age_girl_chained",
+        "age_girl_masterised",
         "prerequisites",
         "educatives",
     )
@@ -52,8 +58,6 @@ class SkillAdmin(ForeignKeyAutocompleteAdmin):
         "level",
         "rank",
         "notation",
-        "age_boy",
-        "age_girl",
     )
 
     ordering = ("long_label", "short_label")
@@ -67,8 +71,6 @@ class SkillAdmin(ForeignKeyAutocompleteAdmin):
         "rotation",
         "level",
         "difficulty",
-        "age_boy",
-        "age_girl",
     )
 
     filter_horizontal = ("educatives", "prerequisites")
diff --git a/ultron/objective/models.py b/ultron/objective/models.py
index cfe6e08b11..5e91bd560a 100644
--- a/ultron/objective/models.py
+++ b/ultron/objective/models.py
@@ -11,6 +11,21 @@ class Educative(Markdownizable):
     Classe `mère`.
     """
 
+    AGE_CHOICES = (
+        (6, "6-7"),
+        (7, "7-8"),
+        (8, "8-9"),
+        (9, "9-10"),
+        (10, "10-11"),
+        (11, "11-12"),
+        (12, "12-13"),
+        (13, "13-14"),
+        (14, "14-15"),
+        (15, "15-16"),
+        (16, "16-17"),
+        (17, "17+"),
+    )
+
     class Meta:
         verbose_name = "Educatif"
         verbose_name_plural = "Educatifs"
@@ -29,11 +44,31 @@ class Educative(Markdownizable):
     prerequisites = models.ManyToManyField(
         "self", related_name="prerequisite_of", blank=True, symmetrical=False
     )
-    age_boy = models.PositiveSmallIntegerField(
-        blank=True, null=True, verbose_name="Boy's age"
+
+    age_boy_with_help = models.PositiveSmallIntegerField(
+        choices=AGE_CHOICES, verbose_name="Boy's age with help", default=6
     )
-    age_girl = models.PositiveSmallIntegerField(
-        blank=True, null=True, verbose_name="Girl's age"
+    age_boy_without_help = models.PositiveSmallIntegerField(
+        choices=AGE_CHOICES, verbose_name="Boy's age without help", default=6
+    )
+    age_boy_chained = models.PositiveSmallIntegerField(
+        choices=AGE_CHOICES, verbose_name="Boy's age chained", default=6
+    )
+    age_boy_masterised = models.PositiveSmallIntegerField(
+        choices=AGE_CHOICES, verbose_name="Boy's age masterised", default=6
+    )
+
+    age_girl_with_help = models.PositiveSmallIntegerField(
+        choices=AGE_CHOICES, verbose_name="Girl's age with help", default=6
+    )
+    age_girl_without_help = models.PositiveSmallIntegerField(
+        choices=AGE_CHOICES, verbose_name="Girl's age without help", default=6
+    )
+    age_girl_chained = models.PositiveSmallIntegerField(
+        choices=AGE_CHOICES, verbose_name="Girl's age chained", default=6
+    )
+    age_girl_masterised = models.PositiveSmallIntegerField(
+        choices=AGE_CHOICES, verbose_name="Girl's age masterised", default=6
     )
 
     def __str__(self):
diff --git a/ultron/objective/views.py b/ultron/objective/views.py
index 40622067fb..4a08f180f4 100644
--- a/ultron/objective/views.py
+++ b/ultron/objective/views.py
@@ -80,17 +80,33 @@ def skill_details(request, skillid):
     skill = get_object_or_404(Skill, pk=skillid)
 
     for prerequisite in skill.prerequisites.all():
-        if prerequisite.level >= skill.level:
-            skill.level = prerequisite.level + 1
+        skill.level = max(prerequisite.level + 1, skill.level)
+        # if prerequisite.level >= skill.level:
+        #     skill.level = prerequisite.level + 1
 
-        if prerequisite.rank >= skill.rank:
-            skill.rank = prerequisite.rank + 1
+        skill.rank = max(prerequisite.rank + 1, skill.rank)
+        # if prerequisite.rank >= skill.rank:
+        #     skill.rank = prerequisite.rank + 1
 
-        if prerequisite.age_boy > skill.age_boy:
-            skill.age_boy = prerequisite.age_boy
+        skill.age_boy_with_help = max(skill.age_boy_with_help, prerequisite.age_boy_with_help)
+        skill.age_boy_without_help = max(
+            skill.age_boy_without_help,
+            prerequisite.age_boy_without_help
+        )
+        skill.age_boy_chained = max(skill.age_boy_chained, prerequisite.age_boy_chained)
+        skill.age_boy_masterised = max(skill.age_boy_masterised, prerequisite.age_boy_masterised)
+        # if prerequisite.age_boy > skill.age_boy:
+        #     skill.age_boy = prerequisite.age_boy
 
-        if prerequisite.age_girl > skill.age_girl:
-            skill.age_girl = prerequisite.age_girl
+        skill.age_girl_with_help = max(skill.age_girl_with_help, prerequisite.age_girl_with_help)
+        skill.age_girl_without_help = max(
+            skill.age_girl_without_help,
+            prerequisite.age_girl_without_help
+        )
+        skill.age_girl_chained = max(skill.age_girl_chained, prerequisite.age_girl_chained)
+        skill.age_girl_masterised = max(skill.age_girl_masterised, prerequisite.age_girl_masterised)
+        # if prerequisite.age_girl > skill.age_girl:
+        #     skill.age_girl = prerequisite.age_girl
 
     skill.save()
 
@@ -158,20 +174,16 @@ def routine_details(request, routineid):
 
     rank = 0
     level = 0
-    difficulty = 0
     age_boy = 0
     age_girl = 0
+    difficulty = 0
     is_competitive = True
 
     for skill_link in routine.skill_links.all():
 
         difficulty += skill_link.skill.difficulty
-
-        if skill_link.skill.level > level:
-            level = skill_link.skill.level
-
-        if skill_link.skill.rank > rank:
-            rank = skill_link.skill.rank + 1
+        level = max(skill_link.skill.level, level)
+        rank = max(skill_link.skill.rank + 1, rank)
 
         if not skill_link.skill.is_competitive:
             is_competitive = False
@@ -189,12 +201,8 @@ def routine_details(request, routineid):
         is_competitive = False
 
     routine.difficulty = difficulty
-
-    if routine.level < level:
-        routine.level = level
-
-    if routine.rank is None or routine.rank < rank:
-        routine.rank = rank
+    routine.level = max(routine.level, level)
+    routine.rank = max(routine.rank, rank)
 
     if routine.age_boy is None or routine.age_boy < age_boy:
         routine.age_boy = age_boy
diff --git a/ultron/planning/admin.py b/ultron/planning/admin.py
index 6990f2efca..036329ea68 100644
--- a/ultron/planning/admin.py
+++ b/ultron/planning/admin.py
@@ -4,7 +4,7 @@ from django_extensions.admin import ForeignKeyAutocompleteAdmin
 from .models import (
     EventType,
     Event,
-    Event_Participation,
+    EventParticipation,
 )
 
 
@@ -46,7 +46,7 @@ class EventAdmin(ForeignKeyAutocompleteAdmin):
 
 
 class EventParticipationAdmin(admin.ModelAdmin):
-    model = Event_Participation
+    model = EventParticipation
 
     fields = ("event", "gymnast", "rank")
     list_display = ("event", "gymnast", "rank")
@@ -54,4 +54,4 @@ class EventParticipationAdmin(admin.ModelAdmin):
 
 admin.site.register(EventType, EventTypeAdmin)
 admin.site.register(Event, EventAdmin)
-admin.site.register(Event_Participation, EventParticipationAdmin)
+admin.site.register(EventParticipation, EventParticipationAdmin)
diff --git a/ultron/planning/models.py b/ultron/planning/models.py
index 13d2034eaf..28f8b844e1 100644
--- a/ultron/planning/models.py
+++ b/ultron/planning/models.py
@@ -59,7 +59,7 @@ class Event(Markdownizable, Temporizable):
     name = models.CharField(max_length=255, verbose_name="Nom")
     gymnasts = models.ManyToManyField(
         Gymnast,
-        through="Event_Participation",
+        through="EventParticipation",
         related_name="participate_to",
         verbose_name="Participants",
     )
@@ -85,7 +85,7 @@ class Event(Markdownizable, Temporizable):
         return get_number_of_weeks_between(today, self.datebegin.date())
 
 
-class Event_Participation(models.Model):
+class EventParticipation(models.Model):
     """ """
 
     class Meta:
diff --git a/ultron/planning/views.py b/ultron/planning/views.py
index d7a2eed93e..5da0380e3d 100644
--- a/ultron/planning/views.py
+++ b/ultron/planning/views.py
@@ -7,7 +7,7 @@ from ultron.people.models import Gymnast
 
 from .models import (
     Event,
-    Event_Participation,
+    EventParticipation,
 )
 
 from .forms import EventForm
@@ -79,7 +79,7 @@ def link_gymnast_to_event(request, eventid, gymnastid):
     try:
         gymnast = get_object_or_404(Gymnast, pk=gymnastid)
         event = get_object_or_404(Event, pk=eventid)
-        Event_Participation.objects.create(gymnast=gymnast, event=event)
+        EventParticipation.objects.create(gymnast=gymnast, event=event)
     except:
         return HttpResponse(409)
 
@@ -100,7 +100,7 @@ def remove_link_between_gymnast_and_event(request, eventid, gymnastid):
     try:
         gymnast = get_object_or_404(Gymnast, pk=gymnastid)
         event = get_object_or_404(Event, pk=eventid)
-        link = Event_Participation.objects.get(event=event, gymnast=gymnast)
+        link = EventParticipation.objects.get(event=event, gymnast=gymnast)
         link.delete()
     except:
         return HttpResponse(409)