diff --git a/backend/model/assessment.py b/backend/model/assessment.py
new file mode 100644
index 0000000..27d0bc1
--- /dev/null
+++ b/backend/model/assessment.py
@@ -0,0 +1,68 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+from datetime import date
+from typing import Optional
+
+from backend.model.student import Tribe
+
+
+class Assessment:
+    def __init__(self, name: str, tribe: Tribe, term: int) -> None:
+        self.tribe = tribe
+        self.term = term
+        self.name = name
+        self.exercises = []
+
+    def register_exercise(self, exercise: Exercise):
+        self.exercises.append(exercise)
+
+    @property
+    def questions(self):
+        return sum([exercise.questions for exercise in self.exercises])
+
+
+class Exercise:
+    def __init__(self, name: str, assessment: Assessment, date: Optional[date]) -> None:
+        self.name = name
+        self.assessment = assessment
+        self.date = date
+        self.questions = []
+
+        self.assessment.register_exercise(self)
+
+    def register_question(self, question: Question):
+        self.questions.append(question)
+
+
+@dataclass(frozen=True)
+class Domain:
+    name: str
+    description: str
+
+
+@dataclass(frozen=True)
+class Skill:
+    name: str
+    description: str
+
+
+class Question:
+    def __init__(
+        self,
+        name: str,
+        exercise: Exercise,
+        description: str,
+        skill: Skill,
+        domain: Domain,
+        is_leveled: bool,
+        scale: int,
+    ) -> None:
+        self.name = name
+        self.exercise = exercise
+        self.exercise.register_question(self)
+        self.description = description
+        self.skill = skill
+        self.domain = domain
+        self.is_leveled = is_leveled
+        self.scale = scale
diff --git a/tests/model/test_assessment.py b/tests/model/test_assessment.py
new file mode 100644
index 0000000..59b4368
--- /dev/null
+++ b/tests/model/test_assessment.py
@@ -0,0 +1,56 @@
+from backend.model.assessment import Assessment, Domain, Exercise, Question, Skill
+from backend.model.student import Tribe
+
+
+def build_tribe():
+    return Tribe("plop", "2nd")
+
+
+def build_tribe_assessment():
+    tribe = build_tribe()
+    assessment = Assessment("DS1", tribe, 1)
+    return tribe, assessment
+
+
+def build_tribe_assessment_exercise():
+    tribe, assessment = build_tribe_assessment()
+    exercise = Exercise("ex1", assessment, "today")
+    return tribe, assessment, exercise
+
+
+def build_skills():
+    return [Skill("search", "Searching and finding")]
+
+
+def build_domains():
+    return [Domain("function", "Functions are great")]
+
+
+def build_tribe_assessment_exercise_question():
+    tribe, assessment, exercise = build_tribe_assessment_exercise()
+    skills = build_skills()
+    domains = build_domains()
+    question = Question(
+        "a",
+        exercise,
+        description="desc",
+        skill=skills[0],
+        domain=domains[0],
+        is_leveled=True,
+        scale=1,
+    )
+    return tribe, assessment, exercise, question
+
+
+def test_assessement_register_exercise():
+    tribe, assessment, exercise = build_tribe_assessment_exercise()
+
+    assert len(assessment.exercises) == 1
+    assert assessment.exercises[0] == exercise
+
+
+def test_exercise_register_question():
+    tribe, assessment, exercise, question = build_tribe_assessment_exercise_question()
+
+    assert len(exercise.questions) == 1
+    assert exercise.questions[0] == question