diff --git a/API/app/infrastructure/database/models/courses.py b/API/app/infrastructure/database/models/courses.py
index 4fcb2a3..9e54e4d 100644
--- a/API/app/infrastructure/database/models/courses.py
+++ b/API/app/infrastructure/database/models/courses.py
@@ -19,3 +19,5 @@ class Course(Base):
 
     students = relationship('CourseStudent', back_populates='course')
     notifications = relationship('Notification', back_populates='course')
+
+    lessons = relationship('Lesson', back_populates='course')
diff --git a/API/app/infrastructure/database/models/lectures.py b/API/app/infrastructure/database/models/lectures.py
new file mode 100644
index 0000000..f8d9495
--- /dev/null
+++ b/API/app/infrastructure/database/models/lectures.py
@@ -0,0 +1,17 @@
+from sqlalchemy import Column, Integer, String, ForeignKey
+from sqlalchemy.orm import relationship
+
+from app.infrastructure.database.models import Base
+
+
+class Lectures(Base):
+    __tablename__ = 'lectures'
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    text = Column(String, nullable=False)
+    image = Column(String)
+    number = Column(Integer, nullable=False)
+
+    step_id = Column(Integer, ForeignKey('steps.id'), nullable=False)
+
+    step = relationship('Step', back_populates='lectures')
diff --git a/API/app/infrastructure/database/models/lessons.py b/API/app/infrastructure/database/models/lessons.py
new file mode 100644
index 0000000..9ecc5bb
--- /dev/null
+++ b/API/app/infrastructure/database/models/lessons.py
@@ -0,0 +1,18 @@
+from sqlalchemy import Column, Integer, String, ForeignKey, VARCHAR
+from sqlalchemy.orm import relationship
+
+from app.infrastructure.database.models import Base
+
+
+class Lesson(Base):
+    __tablename__ = 'lessons'
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    title = Column(VARCHAR(200), nullable=False)
+    description = Column(String, nullable=False)
+
+    course_id = Column(Integer, ForeignKey('courses.id'), nullable=False)
+
+    course = relationship('Course', back_populates='lessons')
+
+    steps = relationship('Step', back_populates='lesson')
diff --git a/API/app/infrastructure/database/models/step_tasks.py b/API/app/infrastructure/database/models/step_tasks.py
new file mode 100644
index 0000000..6f773dc
--- /dev/null
+++ b/API/app/infrastructure/database/models/step_tasks.py
@@ -0,0 +1,19 @@
+from sqlalchemy import Column, Integer, String, ForeignKey
+from sqlalchemy.orm import relationship
+
+from app.infrastructure.database.models import Base
+
+
+class StepTask(Base):
+    __tablename__ = 'step_tasks'
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    text = Column(String, nullable=False)
+
+    step_id = Column(Integer, ForeignKey('steps.id'), nullable=False)
+    type_id = Column(Integer, ForeignKey('task_types.id'), nullable=False)
+
+    step = relationship('Step', back_populates='tasks')
+    type = relationship('TaskType', back_populates='tasks')
+
+    files = relationship('TaskFile', back_populates='task')
diff --git a/API/app/infrastructure/database/models/step_types.py b/API/app/infrastructure/database/models/step_types.py
new file mode 100644
index 0000000..9ad8f3c
--- /dev/null
+++ b/API/app/infrastructure/database/models/step_types.py
@@ -0,0 +1,14 @@
+from sqlalchemy import Column, Integer, String, VARCHAR
+from sqlalchemy.orm import relationship
+
+from app.infrastructure.database.models import Base
+
+
+class StepType(Base):
+    __tablename__ = 'step_types'
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    title = Column(VARCHAR(200), nullable=False)
+    description = Column(String, nullable=False)
+
+    steps = relationship('Step', back_populates='type')
diff --git a/API/app/infrastructure/database/models/steps.py b/API/app/infrastructure/database/models/steps.py
new file mode 100644
index 0000000..680a206
--- /dev/null
+++ b/API/app/infrastructure/database/models/steps.py
@@ -0,0 +1,20 @@
+from sqlalchemy import Column, Integer, ForeignKey, VARCHAR
+from sqlalchemy.orm import relationship
+
+from app.infrastructure.database.models import Base
+
+
+class Step(Base):
+    __tablename__ = 'steps'
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    title = Column(VARCHAR(200))
+
+    lesson_id = Column(Integer, ForeignKey('lessons.id'), nullable=False)
+    type_id = Column(Integer, ForeignKey('step_types.id'), nullable=False)
+
+    lesson = relationship('Lesson', back_populates='steps')
+    type = relationship('StepType', back_populates='steps')
+
+    lectures = relationship('Lectures', back_populates='step')
+    tasks = relationship('StepTask', back_populates='step')
diff --git a/API/app/infrastructure/database/models/task_files.py b/API/app/infrastructure/database/models/task_files.py
new file mode 100644
index 0000000..6ee5b5a
--- /dev/null
+++ b/API/app/infrastructure/database/models/task_files.py
@@ -0,0 +1,16 @@
+from sqlalchemy import Column, Integer, String, ForeignKey
+from sqlalchemy.orm import relationship
+
+from app.infrastructure.database.models import Base
+
+
+class TaskFile(Base):
+    __tablename__ = 'task_files'
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    file_path = Column(String, nullable=False)
+    file_title = Column(String, nullable=False)
+
+    task_id = Column(Integer, ForeignKey('step_tasks.id'), nullable=False)
+
+    task = relationship('StepTask', back_populates='files')
diff --git a/API/app/infrastructure/database/models/task_types.py b/API/app/infrastructure/database/models/task_types.py
new file mode 100644
index 0000000..a914587
--- /dev/null
+++ b/API/app/infrastructure/database/models/task_types.py
@@ -0,0 +1,14 @@
+from sqlalchemy import Column, Integer, String, VARCHAR
+from sqlalchemy.orm import relationship
+
+from app.infrastructure.database.models import Base
+
+
+class TaskType(Base):
+    __tablename__ = 'task_types'
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    title = Column(VARCHAR(200), nullable=False)
+    description = Column(String, nullable=False)
+
+    tasks = relationship('StepTask', back_populates='type')