diff --git a/notes_tools/tools/evaluation.py b/notes_tools/tools/evaluation.py
index 8acfc3c..d816ecf 100644
--- a/notes_tools/tools/evaluation.py
+++ b/notes_tools/tools/evaluation.py
@@ -3,6 +3,12 @@
 
 import pandas as pd
 import numpy as np
+from notes_tools.tools.marks_plottings import (pie_pivot_table,
+        parallel_on,
+        radar_on,
+        )
+
+import seaborn as sns
 
 class Student(object):
 
@@ -89,6 +95,72 @@ class Student(object):
         tabular.append(r"\end{tabular}")
         return '\n'.join(tabular)
 
+    @property
+    def pies_on_competence(self):
+        """ Pies chart on competences """
+        try:
+            self._pies_on_competence
+        except AttributeError:
+            self._pies_on_competence = pie_pivot_table(self.quest_df,
+                    index = "Level",
+                    columns = "Competence",
+                    values = "Eleve",
+                    aggfunc = len,
+                    fill_value = 0,
+                    )
+        return self._pies_on_competence
+
+    @property
+    def pies_on_domaine(self):
+        """ Pies chart on domaines """
+        try:
+            self._pies_on_domaine
+        except AttributeError:
+            self._pies_on_domaine = pie_pivot_table(self.quest_df,
+                    index = "Level",
+                    columns = "Domaine",
+                    values = "Eleve",
+                    aggfunc = len,
+                    fill_value = 0,
+                    )
+        return self._pies_on_domaine
+
+    @property
+    def radar_on_competence(self):
+        """ Radar plot on competence """
+        try:
+            self._radar_on_competence
+        except AttributeError:
+            self._radar_on_competence = radar_on(self.quest_df,
+                    "Competence")
+        return self._radar_on_competence
+
+    @property
+    def radar_on_domaine(self):
+        """ Radar plot on domaine """
+        try:
+            self._radar_on_domaine
+        except AttributeError:
+            self._radar_on_domaine = radar_on(self.quest_df,
+                    "Domaine")
+        return self._radar_on_domaine
+
+    @property
+    def heatmap_on_domain(self):
+        """ Heatmap over evals on domains """
+        try:
+            self._heatmap_on_domain
+        except AttributeError:
+            comp = pd.pivot_table(self.quest_df,
+                    index = "Competence",
+                    columns = ["Exercice", "Question"],
+                    values = ["Normalized"],
+                    aggfunc = np.mean,
+                    )
+            comp.columns = [f"{i['Exercice']} {i['Question']}" for _,i in self.quest_df[["Exercice", "Question"]].drop_duplicates().iterrows()]
+            self._heatmap_on_domain = sns.heatmap(comp)
+        return self._heatmap_on_domain
+
 class Classe(object):
 
     """ 
@@ -96,7 +168,68 @@ class Classe(object):
     
     Those informations should not be modify or use for compute analysis otherwise they won't be spread over other POV.
     """
-    pass
+    def __init__(self, quest_df, exo_df, eval_df):
+        """ Init of a class from quest, exo and eval """
+        names = {*quest_df["Nom"].unique(),
+                *exo_df["Nom"].unique(),
+                *eval_df["Nom"].unique(),
+                }
+
+        if len(names) != 1:
+            raise ValueError("Can't initiate Classe: dfs contains different evaluation names")
+
+        self.name = names.pop()
+
+        self.quest_df = quest_df
+        self.exo_df = exo_df
+        self.eval_df = eval_df
+
+    @property
+    def marks_tabular(self):
+        """ Latex tabular with marks of students"""
+        try:
+            self._marks_tabular
+        except AttributeError:
+            self._marks_tabular = self.eval_df[["Eleve", "Mark_barem"]]
+            self._marks_tabular.columns = ["Élèves", "Note"]
+        return self._marks_tabular.to_latex()
+
+    @property
+    def level_heatmap(self):
+        """ Heapmap on acheivement level """
+        try:
+            self._level_heatmap
+        except AttributeError:
+            pv = pd.pivot_table(self.quest_df,
+                    index = "Eleve",
+                    columns = ["Exercice", "Question", "Commentaire"],
+                    values = ["Normalized"],
+                    aggfunc = "mean",
+                    )
+
+            def lines_4_heatmap(c):
+                lines = []
+                ini = ''
+                for k,v in enumerate(c.labels[1][::-1]):
+                    if v != ini:
+                        lines.append(k)
+                        ini = v
+                return lines[1:]
+            exercice_sep = lines_4_heatmap(pv.columns)
+
+            pv.columns = [f"{i[1]} {i[2]} {i[3]:.15}" for i in pv.columns.get_values()]
+            
+            self._level_heatmap = sns.heatmap(pv.T)
+
+            self._level_heatmap.hlines(exercice_sep, 
+                    *self._level_heatmap.get_xlim(),
+                    colors = "orange",
+                    )
+
+        return self._level_heatmap
+
+
+    
 
 # TODO: à factoriser Il y a la même dans term.py |jeu. mars 23 19:36:28 EAT 2017
 def select(quest_df, exo_df, eval_df, index, value):