diff --git a/backend/migrations/env.py b/backend/migrations/env.py
index 38798ad..79d9992 100644
--- a/backend/migrations/env.py
+++ b/backend/migrations/env.py
@@ -34,9 +34,9 @@
 from game.modules.models import Module
 from game.levels.models import Level, LevelTheory, LevelTask
 from game.units.tasks.models import TaskUnit, EmployeesTask
-from game.units.tasks.questions.models import Question, Answer
+from game.units.tasks.questions.models import Question, AnswerOption
 from game.units.tasks.proofs.models import Proof, ProofVideos, ProofImages
-from game.units.theory.models import TheoryUnit, TheoryVideo
+from game.units.theory.models import TheoryUnit  # , TheoryVideo
 
 from users.models import User
 from users.tutors.models import Tutor
diff --git a/backend/src/game/levels/enums.py b/backend/src/game/levels/enums.py
new file mode 100644
index 0000000..02d64dd
--- /dev/null
+++ b/backend/src/game/levels/enums.py
@@ -0,0 +1,7 @@
+from enum import auto, Enum
+
+
+class LevelStates(Enum):
+    NotViewed = auto()
+    Viewed = auto()
+    Completed = auto()
diff --git a/backend/src/game/levels/models.py b/backend/src/game/levels/models.py
index 673332b..0132daa 100644
--- a/backend/src/game/levels/models.py
+++ b/backend/src/game/levels/models.py
@@ -1,14 +1,14 @@
-import enum
 import typing
 import uuid
 
-from sqlalchemy import String, Boolean, UUID, ForeignKey, Enum
+from sqlalchemy import String, UUID, ForeignKey
 from sqlalchemy.dialects import postgresql
-from sqlalchemy.ext.associationproxy import AssociationProxy, association_proxy
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from database import BaseModel
+from game.levels.enums import LevelStates
 from game.levels.schemas import LevelRead
+from game.units import TaskUnit, TheoryUnit
 
 if typing.TYPE_CHECKING:
     from game.modules.models import Module
@@ -16,12 +16,6 @@
     from game.units.theory.models import TheoryUnit
 
 
-class LevelStates(enum.Enum):
-    NotViewed = enum.auto()
-    Viewed = enum.auto()
-    Completed = enum.auto()
-
-
 class Level(BaseModel):
     __tablename__ = 'levels'
 
diff --git a/backend/src/game/levels/schemas.py b/backend/src/game/levels/schemas.py
index 971b613..57f8081 100644
--- a/backend/src/game/levels/schemas.py
+++ b/backend/src/game/levels/schemas.py
@@ -20,8 +20,9 @@ class LevelRead(__LevelBase):
 
 
 class LevelCreate(__LevelBase):
-    theory_units: list[TheoryUnitRead] | None
-    task_units: list[TaskUnitRead] | None
+    # theory_units: list[TheoryUnitRead] | None
+    # task_units: list[TaskUnitRead] | None
+    pass
 
 
 class LevelUpdate(__LevelBase):
diff --git a/backend/src/game/units/__init__.py b/backend/src/game/units/__init__.py
new file mode 100644
index 0000000..ebdf5e2
--- /dev/null
+++ b/backend/src/game/units/__init__.py
@@ -0,0 +1,2 @@
+from .tasks import TaskUnit
+from .theory import TheoryUnit
diff --git a/backend/src/game/units/tasks/__init__.py b/backend/src/game/units/tasks/__init__.py
index d4284f4..540523f 100644
--- a/backend/src/game/units/tasks/__init__.py
+++ b/backend/src/game/units/tasks/__init__.py
@@ -1 +1 @@
-from .models import TaskUnit, TaskTypes, TaskStates, EmployeesTask
+from .models import TaskUnit, EmployeesTask
diff --git a/backend/src/game/units/tasks/enums.py b/backend/src/game/units/tasks/enums.py
new file mode 100644
index 0000000..35f65b1
--- /dev/null
+++ b/backend/src/game/units/tasks/enums.py
@@ -0,0 +1,12 @@
+from enum import Enum, auto
+
+
+class TaskTypes(Enum):
+    Test = auto()
+
+
+class TaskStates(Enum):
+    NotViewed = auto()
+    Viewed = auto()
+    Submitted = auto()
+    Finished = auto()
diff --git a/backend/src/game/units/tasks/models.py b/backend/src/game/units/tasks/models.py
index 6d70184..0af2b6c 100644
--- a/backend/src/game/units/tasks/models.py
+++ b/backend/src/game/units/tasks/models.py
@@ -1,5 +1,4 @@
 import uuid
-import enum
 from typing import TYPE_CHECKING
 
 from sqlalchemy import UUID, Integer, ForeignKey, Boolean
@@ -7,22 +6,13 @@
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from database import BaseModel
+from .enums import TaskTypes, TaskStates
 from .schemas import TaskUnitRead
 
 if TYPE_CHECKING:
     from game.levels.models import Level
     from questions.models import Question
 
-class TaskTypes(enum.Enum):
-    Test = enum.auto()
-
-
-class TaskStates(enum.Enum):
-    NotViewed = enum.auto()
-    Viewed = enum.auto()
-    Submitted = enum.auto()
-    Finished = enum.auto()
-
 
 class TaskUnit(BaseModel):
     __tablename__ = 'tasks'
@@ -30,10 +20,11 @@ class TaskUnit(BaseModel):
     id: Mapped[uuid.UUID] = mapped_column(UUID, primary_key=True, default=uuid.uuid4)
     type: Mapped[TaskTypes] = mapped_column(postgresql.ENUM(TaskTypes, name='task_types'), nullable=False,
                                             default=TaskTypes.Test)
+    level_id: Mapped[uuid.UUID] = mapped_column(UUID, ForeignKey('levels.id'), default=uuid.uuid4, nullable=True)
     requires_review: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
     score_reward: Mapped[int] = mapped_column(Integer, nullable=False, default=1)
 
-    # questions: Mapped[list["Question"]] = relationship()
+    questions: Mapped[list["Question"]] = relationship(back_populates='task')
     level: Mapped[list["Level"]] = relationship(secondary="level_tasks", back_populates='task_units')
 
     def to_read_schema(self) -> TaskUnitRead:
diff --git a/backend/src/game/units/tasks/questions/models.py b/backend/src/game/units/tasks/questions/models.py
index 4447494..00e46da 100644
--- a/backend/src/game/units/tasks/questions/models.py
+++ b/backend/src/game/units/tasks/questions/models.py
@@ -2,7 +2,7 @@
 import enum
 from typing import TYPE_CHECKING
 
-from sqlalchemy import UUID, Enum, String
+from sqlalchemy import UUID, Enum, String, ForeignKey
 from sqlalchemy.dialects import postgresql
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
@@ -21,21 +21,22 @@ class Question(BaseModel):
     __tablename__ = 'questions'
 
     id: Mapped[uuid.UUID] = mapped_column(UUID, primary_key=True, default=uuid.uuid4)
+    task_id: Mapped[uuid.UUID] = mapped_column(UUID, ForeignKey('tasks.id'), default=uuid.uuid4, nullable=True)
     type: Mapped[QuestionTypes] = mapped_column(
         postgresql.ENUM(QuestionTypes, name='question_types'), nullable=False, default=QuestionTypes.SingleChoice)
     question: Mapped[str] = mapped_column(String, nullable=False, default="Вопрос!")
     correct_answer_id: Mapped[uuid.UUID] = mapped_column(UUID, default=uuid.uuid4)
 
     task: Mapped["TaskUnit"] = relationship(back_populates='questions')
-    possible_answers: Mapped[list["Answer"]] = relationship(back_populates='question')
-    correct_answers: Mapped[list["Answer"]] = relationship(back_populates='question')
+    possible_answers: Mapped[list["AnswerOption"]] = relationship(back_populates='question')
+    correct_answers: Mapped[list["AnswerOption"]] = relationship(back_populates='question')
 
 
-class Answer(BaseModel):
+class AnswerOption(BaseModel):
     __tablename__ = 'answers'
 
     id: Mapped[uuid.UUID] = mapped_column(UUID, primary_key=True, default=uuid.uuid4)
-    question_id: Mapped[uuid.UUID] = mapped_column(UUID, default=uuid.uuid4)
+    question_id: Mapped[uuid.UUID] = mapped_column(UUID, ForeignKey('questions.id'), default=uuid.uuid4)
     content: Mapped[str] = mapped_column(String, nullable=False, default='Ответ?')
 
-    question: Mapped["Question"] = relationship(back_populates='answers')
+    question: Mapped["Question"] = relationship(back_populates='possible_answers')
diff --git a/backend/src/game/units/tasks/schemas.py b/backend/src/game/units/tasks/schemas.py
index 8d6ff63..5475148 100644
--- a/backend/src/game/units/tasks/schemas.py
+++ b/backend/src/game/units/tasks/schemas.py
@@ -1,10 +1,9 @@
-import typing
 from uuid import UUID
 
 from pydantic import BaseModel, ConfigDict
 
 from game.units.tasks.questions.schemas import QuestionRead, QuestionCreate, QuestionUpdate
-from game.units.tasks import TaskTypes
+from game.units.tasks.enums import TaskTypes
 
 
 class __TaskUnitBase(BaseModel):
diff --git a/backend/src/game/units/theory/__init__.py b/backend/src/game/units/theory/__init__.py
new file mode 100644
index 0000000..fba643e
--- /dev/null
+++ b/backend/src/game/units/theory/__init__.py
@@ -0,0 +1 @@
+from .models import TheoryUnit
diff --git a/backend/src/game/units/theory/models.py b/backend/src/game/units/theory/models.py
index 56ae5d5..17e23e3 100644
--- a/backend/src/game/units/theory/models.py
+++ b/backend/src/game/units/theory/models.py
@@ -28,11 +28,11 @@ def to_read_model(self) -> TheoryUnitRead:
                               content=self.content)
 
 
-class TheoryVideo(BaseModel):
-    __tablename__ = 'theory_videos'
-
-    id: Mapped[uuid.UUID] = mapped_column(UUID, primary_key=True, default=uuid.uuid4)
-    theory_id: Mapped[uuid.UUID] = mapped_column(UUID, ForeignKey('theory_blocks.id'), nullable=False)
-    url: Mapped[URL] = mapped_column(URLType, nullable=False)
-
-    theory: Mapped["TheoryUnit"] = relationship(back_populates="theory_video")
+# class TheoryVideo(BaseModel):
+#     __tablename__ = 'theory_videos'
+#
+#     id: Mapped[uuid.UUID] = mapped_column(UUID, primary_key=True, default=uuid.uuid4)
+#     theory_id: Mapped[uuid.UUID] = mapped_column(UUID, ForeignKey('theory_blocks.id'), nullable=False)
+#     url: Mapped[URL] = mapped_column(URLType, nullable=False)
+#
+#     theory: Mapped["TheoryUnit"] = relationship(back_populates="theory_video")
diff --git a/backend/src/main.py b/backend/src/main.py
index ed5c7a0..40a7b40 100644
--- a/backend/src/main.py
+++ b/backend/src/main.py
@@ -2,7 +2,7 @@
 from fastapi.responses import RedirectResponse
 from fastapi.middleware.cors import CORSMiddleware
 
-# from game.levels.router import router as levels_router
+from game.levels.router import router as levels_router
 from game.modules.router import router as modules_router
 from game.map.router import router as map_router
 # from game.units.tasks.router import router as tasks_router
@@ -54,7 +54,7 @@ async def unprotected_route():
 
 
 include_routers(
-    # levels_router,
+    levels_router,
     modules_router,
     map_router,
     # tasks_router,