diff --git a/StudentProgressRecord/Entity/Department.cs b/StudentProgressRecord/Entity/Department.cs
deleted file mode 100644
index bbad602..0000000
--- a/StudentProgressRecord/Entity/Department.cs
+++ /dev/null
@@ -1,28 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace StudentProgressRecord.Entity
-{
-    public class Department
-    {
-
-        public long Id { get; set; }
-
-        public string DepartmentName { get; set; }
-
-        public long FacultyId { get; set; }
-
-        public static Department CreateEntity(long id, string DepartmentName, long facultyId)
-        {
-            return new Department
-            {
-                Id = id,
-                DepartmentName = DepartmentName,
-                FacultyId = facultyId
-            };
-        }
-    }
-}
diff --git a/StudentProgressRecord/Entity/Enums/Operations.cs b/StudentProgressRecord/Entity/Enums/Operations.cs
new file mode 100644
index 0000000..bb295a8
--- /dev/null
+++ b/StudentProgressRecord/Entity/Enums/Operations.cs
@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StudentProgressRecord.Entity.Enums
+{
+    [Flags]
+    public enum Operations
+    {
+        None = 0,
+
+        Transfer = 1 << 0,
+
+        Enroll = 1 << 1,
+
+        Expel = 1 << 2,
+    }
+}
diff --git a/StudentProgressRecord/Entity/Faculty.cs b/StudentProgressRecord/Entity/Faculty.cs
deleted file mode 100644
index b7e1acd..0000000
--- a/StudentProgressRecord/Entity/Faculty.cs
+++ /dev/null
@@ -1,25 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace StudentProgressRecord.Entity
-{
-    public class Faculty
-    {
-        public long Id { get; set; }
-
-        public string FacultyName { get; set; }
-
-        public static Faculty CreateEntity(long id, string facultyName)
-        {
-            return new Faculty()
-            {
-                Id = id,
-                FacultyName = facultyName
-            };
-
-        }
-    }
-}
diff --git a/StudentProgressRecord/Entity/Group.cs b/StudentProgressRecord/Entity/Group.cs
deleted file mode 100644
index 91bbec0..0000000
--- a/StudentProgressRecord/Entity/Group.cs
+++ /dev/null
@@ -1,28 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace StudentProgressRecord.Entity
-{
-    public class Group
-    {
-        public long Id { get; set; }
-
-        public string GroupName { get; set; }
-
-        public long DepartmentId { get; set; }
-
-        public static Group CreateEntity(long id, string groupName, long departmentId)
-        {
-            return new Group 
-            { 
-                Id = id, 
-                GroupName = groupName,
-                DepartmentId = departmentId 
-            };
-        }
-
-    }
-}
diff --git a/StudentProgressRecord/Entity/Marks.cs b/StudentProgressRecord/Entity/Marks.cs
new file mode 100644
index 0000000..5338d97
--- /dev/null
+++ b/StudentProgressRecord/Entity/Marks.cs
@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StudentProgressRecord.Entity
+{
+    public class Marks
+    {
+        public long Id { get; set; }
+
+        public long StatementId { get; set; }
+
+        public long StudentId { get; set; }
+
+        public int Mark { get; set; }
+
+        public static Marks CreateElement(long id, long statementId, long studentId)
+        {
+            return new Marks
+            {
+                Id = id,
+                StatementId = statementId,
+                StudentId = studentId
+            };
+        }
+    }
+}
diff --git a/StudentProgressRecord/Entity/Statement.cs b/StudentProgressRecord/Entity/Statement.cs
index 8b272f9..a6ec764 100644
--- a/StudentProgressRecord/Entity/Statement.cs
+++ b/StudentProgressRecord/Entity/Statement.cs
@@ -9,26 +9,28 @@ namespace StudentProgressRecord.Entity
 {
     public class Statement
     {
+        public long Id { get; set; }
 
         public long SubjectId { get; set; }
 
         public long TeacherId { get; set; }
 
-        public long StudentId { get; set; }
-
         public DateTime Date { get; set; }
 
-        public int Mark {  get; set; }
+        public IEnumerable<Marks> Marks { get; private set; } = [];
 
-        public static Statement CreateEntity(long subjectId, long teacherId, long studentId, DateTime timeStamp, int mark)
+        public static Statement CreateOperation(long id, long subjectId, long teacherId, 
+            DateTime timeStamp, IEnumerable<Marks> marks)
         {
-            return new Statement 
-            { 
-                SubjectId = subjectId, 
+            return new Statement
+            {
+                Id = id,
+                SubjectId = subjectId,
                 TeacherId = teacherId,
-                StudentId = studentId,
                 Date = timeStamp,
-                Mark = mark }; 
+                Marks = marks
+            };
         }
+
     }
 }
diff --git a/StudentProgressRecord/Entity/Student.cs b/StudentProgressRecord/Entity/Student.cs
index aad65b5..3afdc6f 100644
--- a/StudentProgressRecord/Entity/Student.cs
+++ b/StudentProgressRecord/Entity/Student.cs
@@ -17,17 +17,16 @@ namespace StudentProgressRecord.Entity
 
         public bool Domitory { get; set; }
 
-        public long GroupId { get; set; }
 
-        public static Student CreateEntity(long id, string fio, bool familyPos, bool domitory, long groupId)
+        public static Student CreateEntity(long id, string fio, bool familyPos, 
+            bool domitory)
         {
             return new Student
             {
                 Id = id,
                 Fio = fio,
                 FamilyPos = familyPos,
-                Domitory = domitory,
-                GroupId = groupId
+                Domitory = domitory
             };
         }
     }
diff --git a/StudentProgressRecord/Entity/StudentTransition.cs b/StudentProgressRecord/Entity/StudentTransition.cs
new file mode 100644
index 0000000..ab970b1
--- /dev/null
+++ b/StudentProgressRecord/Entity/StudentTransition.cs
@@ -0,0 +1,32 @@
+using StudentProgressRecord.Entity.Enums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StudentProgressRecord.Entity
+{
+    public class StudentTransition
+    {
+
+        public long Id { get; set; }
+
+        public long StudentId { get; set; }
+
+        public Operations Operation { get; set; }
+
+        public DateTime timeStamp { get; set; }
+
+        public static StudentTransition CreateOperation(long id, long studentId, Operations operation, DateTime time)
+        {
+            return new StudentTransition
+            {
+                Id = id,
+                StudentId = studentId,
+                Operation = operation,
+                timeStamp = time
+            };
+        }
+    }
+}
diff --git a/StudentProgressRecord/FormFaculty.Designer.cs b/StudentProgressRecord/FormFaculty.Designer.cs
deleted file mode 100644
index 34707db..0000000
--- a/StudentProgressRecord/FormFaculty.Designer.cs
+++ /dev/null
@@ -1,93 +0,0 @@
-namespace StudentProgressRecord
-{
-    partial class FormFaculty
-    {
-        /// <summary>
-        /// Required designer variable.
-        /// </summary>
-        private System.ComponentModel.IContainer components = null;
-
-        /// <summary>
-        /// Clean up any resources being used.
-        /// </summary>
-        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
-        protected override void Dispose(bool disposing)
-        {
-            if (disposing && (components != null))
-            {
-                components.Dispose();
-            }
-            base.Dispose(disposing);
-        }
-
-        #region Windows Form Designer generated code
-
-        /// <summary>
-        /// Required method for Designer support - do not modify
-        /// the contents of this method with the code editor.
-        /// </summary>
-        private void InitializeComponent()
-        {
-            labelFaculty = new Label();
-            textBoxFaculty = new TextBox();
-            buttonApply = new Button();
-            buttonCancel = new Button();
-            SuspendLayout();
-            // 
-            // labelFaculty
-            // 
-            labelFaculty.AutoSize = true;
-            labelFaculty.Location = new Point(12, 95);
-            labelFaculty.Name = "labelFaculty";
-            labelFaculty.Size = new Size(157, 20);
-            labelFaculty.TabIndex = 0;
-            labelFaculty.Text = "Название факультета";
-            // 
-            // textBoxFaculty
-            // 
-            textBoxFaculty.Location = new Point(175, 92);
-            textBoxFaculty.Name = "textBoxFaculty";
-            textBoxFaculty.Size = new Size(348, 27);
-            textBoxFaculty.TabIndex = 1;
-            // 
-            // buttonApply
-            // 
-            buttonApply.Location = new Point(85, 144);
-            buttonApply.Name = "buttonApply";
-            buttonApply.Size = new Size(180, 29);
-            buttonApply.TabIndex = 2;
-            buttonApply.Text = "Сохранить";
-            buttonApply.UseVisualStyleBackColor = true;
-            // 
-            // buttonCancel
-            // 
-            buttonCancel.Location = new Point(271, 144);
-            buttonCancel.Name = "buttonCancel";
-            buttonCancel.Size = new Size(180, 29);
-            buttonCancel.TabIndex = 3;
-            buttonCancel.Text = "Отмена";
-            buttonCancel.UseVisualStyleBackColor = true;
-            // 
-            // FormFaculty
-            // 
-            AutoScaleDimensions = new SizeF(8F, 20F);
-            AutoScaleMode = AutoScaleMode.Font;
-            ClientSize = new Size(535, 263);
-            Controls.Add(buttonCancel);
-            Controls.Add(buttonApply);
-            Controls.Add(textBoxFaculty);
-            Controls.Add(labelFaculty);
-            Name = "FormFaculty";
-            Text = "Факультет";
-            ResumeLayout(false);
-            PerformLayout();
-        }
-
-        #endregion
-
-        private Label labelFaculty;
-        private TextBox textBoxFaculty;
-        private Button buttonApply;
-        private Button buttonCancel;
-    }
-}
\ No newline at end of file
diff --git a/StudentProgressRecord/FormFaculty.cs b/StudentProgressRecord/FormFaculty.cs
deleted file mode 100644
index b2279bd..0000000
--- a/StudentProgressRecord/FormFaculty.cs
+++ /dev/null
@@ -1,74 +0,0 @@
-using StudentProgressRecord.Entity;
-using StudentProgressRecord.Repositories;
-using System;
-using System.Collections.Generic;
-using System.ComponentModel;
-using System.Data;
-using System.Drawing;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows.Forms;
-
-namespace StudentProgressRecord
-{
-    public partial class FormFaculty : Form
-    {
-
-        private readonly IFacultyRepository _facultyRepository;
-        private int? _facultyId;
-        public int Id
-        {
-            set
-            {
-                try
-                {
-                    var faculty =
-                    _facultyRepository.ReadFacultyById(value);
-                    if (faculty == null)
-                    {
-                        throw new InvalidDataException(nameof(faculty));
-                    }
-                    textBoxFaculty.Text = faculty.FacultyName;
-                    _facultyId = value;
-                }
-                catch (Exception ex)
-                {
-                    MessageBox.Show(ex.Message, "Ошибка при полученииданных", MessageBoxButtons.OK, MessageBoxIcon.Error);
-                    return;
-                }
-            }
-        }
-        public FormFaculty(IFacultyRepository facultyRepository)
-        {
-            InitializeComponent();
-            _facultyRepository = facultyRepository ?? throw new ArgumentNullException(nameof(facultyRepository));
-        }
-        private void ButtonSave_Click(object sender, EventArgs e)
-        {
-            try
-            {
-                if (string.IsNullOrWhiteSpace(textBoxFaculty.Text))
-                {
-                    throw new Exception("Название факультета не может быть пустым");
-                }
-                if (_facultyId.HasValue)
-                {
-                    _facultyRepository.UpdateFaculty(CreateFaculty(_facultyId.Value));
-                }
-                else
-                {
-                    _facultyRepository.CreateFaculty(CreateFaculty(0));
-                }
-                Close();
-            }
-            catch (Exception ex)
-            {
-                MessageBox.Show(ex.Message, "Ошибка при сохранении",
-                MessageBoxButtons.OK, MessageBoxIcon.Error);
-            }
-        }
-        private void ButtonCancel_Click(object sender, EventArgs e) => Close();
-        private Faculty CreateFaculty(int id) => Faculty.CreateEntity(id, textBoxFaculty.Text);
-    }
-}
diff --git a/StudentProgressRecord/FormFaculty.resx b/StudentProgressRecord/FormFaculty.resx
deleted file mode 100644
index af32865..0000000
--- a/StudentProgressRecord/FormFaculty.resx
+++ /dev/null
@@ -1,120 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<root>
-  <!--
-    Microsoft ResX Schema 
-
-    Version 2.0
-
-    The primary goals of this format is to allow a simple XML format
-    that is mostly human readable. The generation and parsing of the
-    various data types are done through the TypeConverter classes
-    associated with the data types.
-
-    Example:
-
-    ... ado.net/XML headers & schema ...
-    <resheader name="resmimetype">text/microsoft-resx</resheader>
-    <resheader name="version">2.0</resheader>
-    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
-    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
-    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
-    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
-    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
-        <value>[base64 mime encoded serialized .NET Framework object]</value>
-    </data>
-    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
-        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
-        <comment>This is a comment</comment>
-    </data>
-
-    There are any number of "resheader" rows that contain simple
-    name/value pairs.
-
-    Each data row contains a name, and value. The row also contains a
-    type or mimetype. Type corresponds to a .NET class that support
-    text/value conversion through the TypeConverter architecture.
-    Classes that don't support this are serialized and stored with the
-    mimetype set.
-
-    The mimetype is used for serialized objects, and tells the
-    ResXResourceReader how to depersist the object. This is currently not
-    extensible. For a given mimetype the value must be set accordingly:
-
-    Note - application/x-microsoft.net.object.binary.base64 is the format
-    that the ResXResourceWriter will generate, however the reader can
-    read any of the formats listed below.
-
-    mimetype: application/x-microsoft.net.object.binary.base64
-    value   : The object must be serialized with
-            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
-            : and then encoded with base64 encoding.
-    
-    mimetype: application/x-microsoft.net.object.soap.base64
-    value   : The object must be serialized with
-            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
-            : and then encoded with base64 encoding.
-
-    mimetype: application/x-microsoft.net.object.bytearray.base64
-    value   : The object must be serialized into a byte array
-            : using a System.ComponentModel.TypeConverter
-            : and then encoded with base64 encoding.
-    -->
-  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
-    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
-    <xsd:element name="root" msdata:IsDataSet="true">
-      <xsd:complexType>
-        <xsd:choice maxOccurs="unbounded">
-          <xsd:element name="metadata">
-            <xsd:complexType>
-              <xsd:sequence>
-                <xsd:element name="value" type="xsd:string" minOccurs="0" />
-              </xsd:sequence>
-              <xsd:attribute name="name" use="required" type="xsd:string" />
-              <xsd:attribute name="type" type="xsd:string" />
-              <xsd:attribute name="mimetype" type="xsd:string" />
-              <xsd:attribute ref="xml:space" />
-            </xsd:complexType>
-          </xsd:element>
-          <xsd:element name="assembly">
-            <xsd:complexType>
-              <xsd:attribute name="alias" type="xsd:string" />
-              <xsd:attribute name="name" type="xsd:string" />
-            </xsd:complexType>
-          </xsd:element>
-          <xsd:element name="data">
-            <xsd:complexType>
-              <xsd:sequence>
-                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
-                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
-              </xsd:sequence>
-              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
-              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
-              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
-              <xsd:attribute ref="xml:space" />
-            </xsd:complexType>
-          </xsd:element>
-          <xsd:element name="resheader">
-            <xsd:complexType>
-              <xsd:sequence>
-                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
-              </xsd:sequence>
-              <xsd:attribute name="name" type="xsd:string" use="required" />
-            </xsd:complexType>
-          </xsd:element>
-        </xsd:choice>
-      </xsd:complexType>
-    </xsd:element>
-  </xsd:schema>
-  <resheader name="resmimetype">
-    <value>text/microsoft-resx</value>
-  </resheader>
-  <resheader name="version">
-    <value>2.0</value>
-  </resheader>
-  <resheader name="reader">
-    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
-  </resheader>
-  <resheader name="writer">
-    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
-  </resheader>
-</root>
\ No newline at end of file
diff --git a/StudentProgressRecord/IRepositories/IDepartmentRepository.cs b/StudentProgressRecord/IRepositories/IDepartmentRepository.cs
deleted file mode 100644
index 434fb6d..0000000
--- a/StudentProgressRecord/IRepositories/IDepartmentRepository.cs
+++ /dev/null
@@ -1,20 +0,0 @@
-using StudentProgressRecord.Entity;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace StudentProgressRecord.Repositories
-{
-    public interface IDepartmentRepository
-    {
-
-        IEnumerable<Department> ReadDepartments(long? facultyId=null);
-        Department ReadDepartmentById(long id);
-        void CreateDepartment(Department department);
-        void UpdateDepartment(Department department);
-        void DeleteDepartment(long id);
-
-    }
-}
diff --git a/StudentProgressRecord/IRepositories/IFacultyRepository.cs b/StudentProgressRecord/IRepositories/IFacultyRepository.cs
deleted file mode 100644
index 1b1603e..0000000
--- a/StudentProgressRecord/IRepositories/IFacultyRepository.cs
+++ /dev/null
@@ -1,19 +0,0 @@
-using StudentProgressRecord.Entity;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace StudentProgressRecord.Repositories
-{
-    public interface IFacultyRepository
-    {
-        IEnumerable<Faculty> ReadFaculties();
-        Faculty ReadFacultyById(long id);
-        void CreateFaculty(Faculty faculty);
-        void UpdateFaculty(Faculty faculty);
-        void DeleteFaculty(long id);
-
-    }
-}
diff --git a/StudentProgressRecord/IRepositories/IGroupRepository.cs b/StudentProgressRecord/IRepositories/IGroupRepository.cs
deleted file mode 100644
index e73f1e3..0000000
--- a/StudentProgressRecord/IRepositories/IGroupRepository.cs
+++ /dev/null
@@ -1,19 +0,0 @@
-using StudentProgressRecord.Entity;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-
-using System.Threading.Tasks;
-
-namespace StudentProgressRecord.Repositories
-{
-    public interface IGroupRepository
-    {
-        IEnumerable<Group> ReadGroups(long? departmentId=null);
-        Group ReadGroupById(long id);
-        void CreateGroup(Group group);
-        void UpdateGroup(Group group);
-        void DeleteGroup(long id);
-    }
-}
diff --git a/StudentProgressRecord/IRepositories/IStatementRepository.cs b/StudentProgressRecord/IRepositories/IStatementRepository.cs
index e819ea1..05f2b28 100644
--- a/StudentProgressRecord/IRepositories/IStatementRepository.cs
+++ b/StudentProgressRecord/IRepositories/IStatementRepository.cs
@@ -4,10 +4,9 @@ namespace StudentProgressRecord.Repositories
 {
     public interface IStatementRepository
     {
-        IEnumerable<Statement> ReadStatements(long? subjectId, long? teacherId, long? studentId, DateTime? dateTo=null, int? mark=null);
-        Statement ReadStatementById(long id);
+        IEnumerable<Statement> ReadStatements(long? subjectId = null, long? teacherId = null, DateTime? dateFrom = null, DateTime? dateTo=null);
+
         void CreateStatement(Statement statement);
-        void UpdateStatement(Statement statement);
         void DeleteStatement(long id);
     }
 }
diff --git a/StudentProgressRecord/IRepositories/IStudentRepository.cs b/StudentProgressRecord/IRepositories/IStudentRepository.cs
index 9197538..3990746 100644
--- a/StudentProgressRecord/IRepositories/IStudentRepository.cs
+++ b/StudentProgressRecord/IRepositories/IStudentRepository.cs
@@ -9,7 +9,7 @@ namespace StudentProgressRecord.Repositories
 {
     public interface IStudentRepository
     {
-        IEnumerable<Student> ReadStudents(long? groupId = null, bool? familyPos=null, bool? domitory=null);
+        IEnumerable<Student> ReadStudents(bool? familyPos=null, bool? domitory=null);
         Student ReadStudentById(long id);
         void CreateStudent(Student student);
         void UpdateStudent(Student student);
diff --git a/StudentProgressRecord/IRepositories/IStudentTransitionRepository.cs b/StudentProgressRecord/IRepositories/IStudentTransitionRepository.cs
new file mode 100644
index 0000000..21a1d6d
--- /dev/null
+++ b/StudentProgressRecord/IRepositories/IStudentTransitionRepository.cs
@@ -0,0 +1,18 @@
+using StudentProgressRecord.Entity;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StudentProgressRecord.IRepositories
+{
+    public interface IStudentTransitionRepository
+    {
+
+        IEnumerable<StudentTransition> ReadStudentTransitions(long? groupId = null, bool? familyPos = null, bool? domitory = null);
+        StudentTransition ReadStudentTransitionById(long id);
+        void CreateStudentTransition(StudentTransition studentTransition);
+        void DeleteStudentTransition(long id);
+    }
+}
diff --git a/StudentProgressRecord/RepositoryImp/DepartmentRepository.cs b/StudentProgressRecord/RepositoryImp/DepartmentRepository.cs
deleted file mode 100644
index 3e94cef..0000000
--- a/StudentProgressRecord/RepositoryImp/DepartmentRepository.cs
+++ /dev/null
@@ -1,38 +0,0 @@
-using StudentProgressRecord.Entity;
-using StudentProgressRecord.Repositories;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace StudentProgressRecord.RepositoryImp
-{
-    public class DepartmentRepository : IDepartmentRepository
-    {
-        public void CreateDepartment(Department department)
-        {
-
-        }
-
-        public void DeleteDepartment(long id)
-        {
-
-        }
-
-        public Department ReadDepartmentById(long id)
-        {
-            return Department.CreateDepartment(0, string.Empty, 0);
-        }
-
-        public IEnumerable<Department> ReadDepartments(long? facultyId = null)
-        {
-            return [];
-        }
-
-        public void UpdateDepartment(Department department)
-        {
-
-        }
-    }
-}
diff --git a/StudentProgressRecord/RepositoryImp/FacultyRepository.cs b/StudentProgressRecord/RepositoryImp/FacultyRepository.cs
deleted file mode 100644
index dc05a5d..0000000
--- a/StudentProgressRecord/RepositoryImp/FacultyRepository.cs
+++ /dev/null
@@ -1,38 +0,0 @@
-using StudentProgressRecord.Entity;
-using StudentProgressRecord.Repositories;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace StudentProgressRecord.RepositoryImp
-{
-    public class FacultyRepository : IFacultyRepository
-    {
-        public void CreateFaculty(Faculty faculty)
-        {
-
-        }
-
-        public void DeleteFaculty(long id)
-        {
-
-        }
-
-        public IEnumerable<Faculty> ReadFaculties()
-        {
-            return [];
-        }
-
-        public Faculty ReadFacultyById(long id)
-        {
-            return Faculty.CreateFaculty(0, string.Empty);
-        }
-
-        public void UpdateFaculty(Faculty faculty)
-        {
-
-        }
-    }
-}
diff --git a/StudentProgressRecord/RepositoryImp/GroupRepository.cs b/StudentProgressRecord/RepositoryImp/GroupRepository.cs
deleted file mode 100644
index 822ecf5..0000000
--- a/StudentProgressRecord/RepositoryImp/GroupRepository.cs
+++ /dev/null
@@ -1,37 +0,0 @@
-using StudentProgressRecord.Entity;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace StudentProgressRecord.Repositories
-{
-    public class GroupRepository : IGroupRepository
-    {
-        public void CreateGroup(Group group)
-        {
-           
-        }
-
-        public void DeleteGroup(long id)
-        {
-            
-        }
-
-        public Group ReadGroupById(long id)
-        {
-            return Group.CreateGroup(0, string.Empty, 0);
-        }
-
-        public IEnumerable<Group> ReadGroups(long? departmentId = null)
-        {
-            return [];
-        }
-
-        public void UpdateGroup(Group group)
-        {
-           
-        }
-    }
-}
diff --git a/StudentProgressRecord/RepositoryImp/StatementRepository.cs b/StudentProgressRecord/RepositoryImp/StatementRepository.cs
index ac57fb2..ec4736d 100644
--- a/StudentProgressRecord/RepositoryImp/StatementRepository.cs
+++ b/StudentProgressRecord/RepositoryImp/StatementRepository.cs
@@ -12,27 +12,18 @@ namespace StudentProgressRecord.RepositoryImp
     {
         public void CreateStatement(Statement statement)
         {
-
+            
         }
 
         public void DeleteStatement(long id)
         {
-
+            
         }
 
-        public Statement ReadStatementById(long id)
-        {
-            return Statement.CreateStatement(0, 0, 0, DateTime.Now, 0);
-        }
-
-        public IEnumerable<Statement> ReadStatements(long? subjectId, long? teacherId, long? studentId, DateTime? dateTo = null, int? mark = null)
+        public IEnumerable<Statement> ReadStatements(long? subjectId = null, long? teacherId = null, 
+            DateTime? dateFrom = null, DateTime? dateTo = null)
         {
             return [];
         }
-
-        public void UpdateStatement(Statement statement)
-        {
-
-        }
     }
 }
diff --git a/StudentProgressRecord/RepositoryImp/StudentRepository.cs b/StudentProgressRecord/RepositoryImp/StudentRepository.cs
index 6c08807..a4ce0a1 100644
--- a/StudentProgressRecord/RepositoryImp/StudentRepository.cs
+++ b/StudentProgressRecord/RepositoryImp/StudentRepository.cs
@@ -12,7 +12,7 @@ namespace StudentProgressRecord.RepositoryImp
     {
         public void CreateStudent(Student student)
         {
-
+            
         }
 
         public void DeleteStudent(long id)
@@ -22,17 +22,17 @@ namespace StudentProgressRecord.RepositoryImp
 
         public Student ReadStudentById(long id)
         {
-            return Student.CreateStudent(0, string.Empty, false, false, 0);
+            return Student.CreateEntity(0, string.Empty, false , false);
         }
 
-        public IEnumerable<Student> ReadStudents(long? groupId = null, bool? familyPos = null, bool? domitory = null)
+        public IEnumerable<Student> ReadStudents(bool? familyPos = null, bool? domitory = null)
         {
             return [];
         }
 
         public void UpdateStudent(Student student)
         {
-            
+           
         }
     }
 }
diff --git a/StudentProgressRecord/RepositoryImp/StudentTransitionRepository.cs b/StudentProgressRecord/RepositoryImp/StudentTransitionRepository.cs
new file mode 100644
index 0000000..d646aca
--- /dev/null
+++ b/StudentProgressRecord/RepositoryImp/StudentTransitionRepository.cs
@@ -0,0 +1,28 @@
+using StudentProgressRecord.Entity;
+using StudentProgressRecord.IRepositories;
+using StudentProgressRecord.Entity.Enums;
+namespace StudentProgressRecord.RepositoryImp
+{
+    public class StudentTransitionRepository : IStudentTransitionRepository
+    {
+        public void CreateStudentTransition(StudentTransition studentTransition)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void DeleteStudentTransition(long id)
+        {
+            throw new NotImplementedException();
+        }
+
+        public StudentTransition ReadStudentTransitionById(long id)
+        {
+            return StudentTransition.CreateOperation(0, 0, Operations.None, DateTime.Now);
+        }
+
+        public IEnumerable<StudentTransition> ReadStudentTransitions(long? groupId = null, bool? familyPos = null, bool? domitory = null)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}
diff --git a/StudentProgressRecord/RepositoryImp/SubjectRepository.cs b/StudentProgressRecord/RepositoryImp/SubjectRepository.cs
index b86d4e9..6ecf5f8 100644
--- a/StudentProgressRecord/RepositoryImp/SubjectRepository.cs
+++ b/StudentProgressRecord/RepositoryImp/SubjectRepository.cs
@@ -22,7 +22,7 @@ namespace StudentProgressRecord.RepositoryImp
 
         public Subject ReadSubjectById(long id)
         {
-           return Subject.CreateSubject(0, string.Empty);
+           return Subject.CreateEntity(0, string.Empty);
         }
 
         public IEnumerable<Subject> ReadSubjects()
diff --git a/StudentProgressRecord/RepositoryImp/TeacherRepository.cs b/StudentProgressRecord/RepositoryImp/TeacherRepository.cs
index b335348..b815111 100644
--- a/StudentProgressRecord/RepositoryImp/TeacherRepository.cs
+++ b/StudentProgressRecord/RepositoryImp/TeacherRepository.cs
@@ -22,7 +22,7 @@ namespace StudentProgressRecord.RepositoryImp
 
         public Teacher ReadTeacherById(long id)
         {
-            return Teacher.CreateTeacher(0, string.Empty, 0);
+            return Teacher.CreateEntity(0, string.Empty, 0);
         }
 
         public IEnumerable<Teacher> ReadTeachers(long? departmentID = null)