diff --git a/ProjectSchedule/ProjectSchedule/Program.cs b/ProjectSchedule/ProjectSchedule/Program.cs
index 8bcc656..a3a8d0f 100644
--- a/ProjectSchedule/ProjectSchedule/Program.cs
+++ b/ProjectSchedule/ProjectSchedule/Program.cs
@@ -2,6 +2,10 @@ using Unity.Lifetime;
 using Unity;
 using ProjectSchedule.Repositories;
 using ProjectSchedule.Repositories.Implementations;
+using Microsoft.Extensions.Logging;
+using Serilog;
+using Microsoft.Extensions.Configuration;
+using Unity.Microsoft.Logging;
 
 namespace ProjectSchedule
 {
@@ -23,6 +27,8 @@ namespace ProjectSchedule
         {
             var container = new UnityContainer();
 
+            container.AddExtension(new LoggingExtension(CreateLoggerFactory()));
+            
             container.RegisterType<IAudienceRepository, AudienceRepository>(new TransientLifetimeManager());
             container.RegisterType<ICurriculumSupplementRepository, CurriculumSupplementRepository>(new TransientLifetimeManager());
             container.RegisterType<IDisciplineRepository, DisciplineRepository>(new TransientLifetimeManager());
@@ -30,7 +36,21 @@ namespace ProjectSchedule
             container.RegisterType<IGroupStudentsRepository, GroupStudentsRepository>(new TransientLifetimeManager());
             container.RegisterType<ICompilingScheduleRepository, CompilingScheduleRepository>(new TransientLifetimeManager());
 
+            container.RegisterType<IConnectionString, ConnectionString>(new SingletonLifetimeManager());
+
             return container;
         }
+
+        private static LoggerFactory CreateLoggerFactory()
+        {
+            var loggerFactory = new LoggerFactory();
+            loggerFactory.AddSerilog(new LoggerConfiguration()
+                .ReadFrom.Configuration(new ConfigurationBuilder()
+                    .SetBasePath(Directory.GetCurrentDirectory())
+                    .AddJsonFile("appsettings.json")
+                    .Build())
+                .CreateLogger());
+            return loggerFactory;
+        }
     }
 }
\ No newline at end of file
diff --git a/ProjectSchedule/ProjectSchedule/ProjectSchedule.csproj b/ProjectSchedule/ProjectSchedule/ProjectSchedule.csproj
index accbdf0..e3c2e4e 100644
--- a/ProjectSchedule/ProjectSchedule/ProjectSchedule.csproj
+++ b/ProjectSchedule/ProjectSchedule/ProjectSchedule.csproj
@@ -9,7 +9,18 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Dapper" Version="2.1.35" />
+    <PackageReference Include="Microsoft.Extensions.Configuration" Version="9.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="9.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Logging" Version="9.0.0" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+    <PackageReference Include="Npgsql" Version="8.0.5" />
+    <PackageReference Include="Serilog" Version="4.1.0" />
+    <PackageReference Include="Serilog.Extensions.Logging" Version="8.0.0" />
+    <PackageReference Include="Serilog.Settings.Configuration" Version="8.0.4" />
+    <PackageReference Include="Serilog.Sinks.File" Version="6.0.0" />
     <PackageReference Include="Unity" Version="5.11.10" />
+    <PackageReference Include="Unity.Microsoft.Logging" Version="5.11.1" />
   </ItemGroup>
 
   <ItemGroup>
@@ -27,4 +38,10 @@
     </EmbeddedResource>
   </ItemGroup>
 
+  <ItemGroup>
+    <None Update="appsettings.json">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
 </Project>
\ No newline at end of file
diff --git a/ProjectSchedule/ProjectSchedule/Repositories/IConnectionString.cs b/ProjectSchedule/ProjectSchedule/Repositories/IConnectionString.cs
new file mode 100644
index 0000000..eebeaf0
--- /dev/null
+++ b/ProjectSchedule/ProjectSchedule/Repositories/IConnectionString.cs
@@ -0,0 +1,6 @@
+namespace ProjectSchedule.Repositories;
+
+public interface IConnectionString
+{
+    public string ConnectionString { get; }
+}
\ No newline at end of file
diff --git a/ProjectSchedule/ProjectSchedule/Repositories/Implementations/AudienceRepository.cs b/ProjectSchedule/ProjectSchedule/Repositories/Implementations/AudienceRepository.cs
index 0a341ac..f4f1dba 100644
--- a/ProjectSchedule/ProjectSchedule/Repositories/Implementations/AudienceRepository.cs
+++ b/ProjectSchedule/ProjectSchedule/Repositories/Implementations/AudienceRepository.cs
@@ -1,29 +1,120 @@
-using ProjectSchedule.Entities;
-using ProjectSchedule.Entities.Enums;
+using Dapper;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
+using Npgsql;
+using ProjectSchedule.Entities;
 
 namespace ProjectSchedule.Repositories.Implementations;
 
 public class AudienceRepository : IAudienceRepository
 {
+    private readonly IConnectionString _connectionString;
+
+    private readonly ILogger<AudienceRepository> _logger;
+
+    public AudienceRepository(IConnectionString connectionString, ILogger<AudienceRepository> logger)
+    {
+        _connectionString = connectionString;
+        _logger = logger;
+    }
+
     public void CreateAudience(Audience audience)
     {
-    }
-
-    public void DeleteAudience(int id)
-    {
-    }
-
-    public Audience ReadAudienceById(int id)
-    {
-        return Audience.CreateEntity(0, string.Empty, TypeAudience.None, 0);
-    }
-
-    public IEnumerable<Audience> ReadAudiences()
-    {
-        return [];
+        _logger.LogInformation("Добавление объекта");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(audience));
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryInsert = @"
+                INSERT INTO Audiences (NumberAudience, TypeAudience, QuantitySeats)
+                VALUES (@NumberAudience, @TypeAudience, @QuantitySeats)";
+            connection.Execute(queryInsert, audience);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при добавлении объекта");
+            throw;
+        }
     }
 
     public void UpdateAudience(Audience audience)
     {
+        _logger.LogInformation("Редактирование объекта");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(audience));
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryUpdate = @"
+                UPDATE Audiences
+                SET
+                    NumberAudience=@NumberAudience,
+                    TypeAudience=@TypeAudience,
+                    QuantitySeats=@QuantitySeats
+                WHERE Id=@Id";
+            connection.Execute(queryUpdate, audience);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при редактировании объекта");
+            throw;
+        }
+    }
+
+    public void DeleteAudience(int id)
+    {
+        _logger.LogInformation("Удаление объекта");
+        _logger.LogDebug("Объект: {id}", id);
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryDelete = @"
+                DELETE FROM Audiences
+                WHERE Id=@id";
+            connection.Execute(queryDelete, new { id });
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при удалении объекта");
+            throw;
+        }
+    }
+
+    public Audience ReadAudienceById(int id)
+    {
+        _logger.LogInformation("Получение объекта по идентификатору");
+        _logger.LogDebug("Объект: {id}", id);
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var querySelect = @"
+                SELECT * FROM Audiences
+                WHERE Id=@id";
+            var audience = connection.QueryFirst<Audience>(querySelect, new { id });
+            _logger.LogDebug("Найденный объект: {json}", JsonConvert.SerializeObject(audience));
+            return audience;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при поиске объекта");
+            throw;
+        }
+    }
+
+    public IEnumerable<Audience> ReadAudiences()
+    {
+        _logger.LogInformation("Получение всех объектов");
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var querySelect = "SELECT * FROM Audiences";
+            var audiences = connection.Query<Audience>(querySelect);
+            _logger.LogDebug("Полученные объекты: {json}", JsonConvert.SerializeObject(audiences));
+            return audiences;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при чтении объектов");
+            throw;
+        }
     }
 }
\ No newline at end of file
diff --git a/ProjectSchedule/ProjectSchedule/Repositories/Implementations/CompilingScheduleRepository.cs b/ProjectSchedule/ProjectSchedule/Repositories/Implementations/CompilingScheduleRepository.cs
index ecbb3ab..5e89537 100644
--- a/ProjectSchedule/ProjectSchedule/Repositories/Implementations/CompilingScheduleRepository.cs
+++ b/ProjectSchedule/ProjectSchedule/Repositories/Implementations/CompilingScheduleRepository.cs
@@ -1,16 +1,60 @@
-using ProjectSchedule.Entities;
+using Dapper;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
+using Npgsql;
+using ProjectSchedule.Entities;
 
 namespace ProjectSchedule.Repositories.Implementations;
 
 public class CompilingScheduleRepository : ICompilingScheduleRepository
 {
+    private readonly IConnectionString _connectionString;
+
+    private readonly ILogger<CompilingScheduleRepository> _logger;
+
+    public CompilingScheduleRepository(IConnectionString connectionString, ILogger<CompilingScheduleRepository> logger)
+    {
+        _connectionString = connectionString;
+        _logger = logger;
+    }
+
     public void CreateCompilingSchedule(CompilingSchedule compilingSchedule)
     {
+        _logger.LogInformation("Добавление объекта");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(compilingSchedule));
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryInsert = @"
+                INSERT INTO CompilingSchedules (EducatorId, DisciplineId, GroupStudentsId, AudienceId,
+TypeWeek, NumberDay, NumberPair, TypeActivity)
+                VALUES (@EducatorId, @DisciplineId, @GroupStudentsId, @AudienceId,
+@TypeWeek, @NumberDay, @NumberPair, @TypeActivity)";
+            connection.Execute(queryInsert, compilingSchedule);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при добавлении объекта");
+            throw;
+        }
     }
 
     public IEnumerable<CompilingSchedule> ReadCompilingSchedules(int? educatorId = null, int? disciplineId = null,
         int? groupStudentsId = null, int? audienceId = null)
     {
-        return [];
+        _logger.LogInformation("Получение всех объектов");
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var querySelect = "SELECT * FROM CompilingSchedules";
+            var compilingSchedules = connection.Query<CompilingSchedule>(querySelect);
+            _logger.LogDebug("Полученные объекты: {json}", JsonConvert.SerializeObject(compilingSchedules));
+            return compilingSchedules;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при чтении объектов");
+            throw;
+        }
     }
 }
\ No newline at end of file
diff --git a/ProjectSchedule/ProjectSchedule/Repositories/Implementations/ConnectionString.cs b/ProjectSchedule/ProjectSchedule/Repositories/Implementations/ConnectionString.cs
new file mode 100644
index 0000000..9b07c44
--- /dev/null
+++ b/ProjectSchedule/ProjectSchedule/Repositories/Implementations/ConnectionString.cs
@@ -0,0 +1,6 @@
+namespace ProjectSchedule.Repositories.Implementations;
+
+internal class ConnectionString : IConnectionString
+{
+    string IConnectionString.ConnectionString => "Host=127.0.0.1;Database=schedule;Username=postgres;Password=732005";
+}
\ No newline at end of file
diff --git a/ProjectSchedule/ProjectSchedule/Repositories/Implementations/CurriculumSupplementRepository.cs b/ProjectSchedule/ProjectSchedule/Repositories/Implementations/CurriculumSupplementRepository.cs
index 48f21c9..1498e17 100644
--- a/ProjectSchedule/ProjectSchedule/Repositories/Implementations/CurriculumSupplementRepository.cs
+++ b/ProjectSchedule/ProjectSchedule/Repositories/Implementations/CurriculumSupplementRepository.cs
@@ -1,20 +1,90 @@
-using ProjectSchedule.Entities;
+using Dapper;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
+using Npgsql;
+using ProjectSchedule.Entities;
 
 namespace ProjectSchedule.Repositories.Implementations;
 
 public class CurriculumSupplementRepository : ICurriculumSupplementRepository
 {
+    private readonly IConnectionString _connectionString;
+
+    private readonly ILogger<CurriculumSupplementRepository> _logger;
+
+    public CurriculumSupplementRepository(IConnectionString connectionString, ILogger<CurriculumSupplementRepository> logger)
+    {
+        _connectionString = connectionString;
+        _logger = logger;
+    }
+
     public void CreateCurriculumSupplement(CurriculumSupplement curriculumSupplement)
     {
+        _logger.LogInformation("Добавление объекта");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(curriculumSupplement));
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            connection.Open();
+            using var transaction = connection.BeginTransaction();
+            var queryInsert = @"
+                INSERT INTO CurriculumSupplements (GroupStudentsId, NameCurriculum, Semester, DateAdoptionPlan)
+                VALUES (@GroupStudentsId, @NameCurriculum, @Semester, @DateAdoptionPlan);
+                SELECT MAX(Id) FROM CurriculumSupplements";
+            var curriculumSupplementId = connection.QueryFirst<int>(queryInsert, curriculumSupplement, transaction);
+
+            var querySubInsert = @"
+                INSERT INTO DisciplineCurriculumSupplements (CurriculumSupplementId, DisciplineId, QuantityLectures, QuantityPractices)
+                VALUES (@CurriculumSupplementId, @DisciplineId, @QuantityLectures, @QuantityPractices)";
+            foreach (var elem in curriculumSupplement.DisciplineCurriculumSupplements)
+            {
+                connection.Execute(querySubInsert, new { curriculumSupplementId, elem.DisciplineId, elem.QuantityLectures, elem.QuantityPractices }, transaction);
+            }
+
+            transaction.Commit();
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при добавлении объекта");
+            throw;
+        }
     }
 
     public void DeleteCurriculumSupplement(int id)
     {
+        _logger.LogInformation("Удаление объекта");
+        _logger.LogDebug("Объект: {id}", id);
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryDelete = @"
+                DELETE FROM CurriculumSupplements
+                WHERE Id=@id";
+            connection.Execute(queryDelete, new { id });
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при удалении объекта");
+            throw;
+        }
     }
 
     public IEnumerable<CurriculumSupplement> ReadCurriculumSupplements(DateTime? dateForm = null, DateTime? dateTo = null,
         int? disciplineId = null, int? groupStudentsId = null)
     {
-        return [];
+        _logger.LogInformation("Получение всех объектов");
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var querySelect = "SELECT * FROM CurriculumSupplements";
+            var curriculumSupplements = connection.Query<CurriculumSupplement>(querySelect);
+            _logger.LogDebug("Полученные объекты: {json}", JsonConvert.SerializeObject(curriculumSupplements));
+            return curriculumSupplements;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при чтении объектов");
+            throw;
+        }
     }
 }
\ No newline at end of file
diff --git a/ProjectSchedule/ProjectSchedule/Repositories/Implementations/DisciplineRepository.cs b/ProjectSchedule/ProjectSchedule/Repositories/Implementations/DisciplineRepository.cs
index c94d026..0b52477 100644
--- a/ProjectSchedule/ProjectSchedule/Repositories/Implementations/DisciplineRepository.cs
+++ b/ProjectSchedule/ProjectSchedule/Repositories/Implementations/DisciplineRepository.cs
@@ -1,28 +1,118 @@
-using ProjectSchedule.Entities;
+using Dapper;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
+using Npgsql;
+using ProjectSchedule.Entities;
 
 namespace ProjectSchedule.Repositories.Implementations;
 
 public class DisciplineRepository : IDisciplineRepository
 {
+    private readonly IConnectionString _connectionString;
+
+    private readonly ILogger<DisciplineRepository> _logger;
+
+    public DisciplineRepository(IConnectionString connectionString, ILogger<DisciplineRepository> logger)
+    {
+        _connectionString = connectionString;
+        _logger = logger;
+    }
+
     public void CreateDiscipline(Discipline discipline)
     {
-    }
-
-    public void DeleteDiscipline(int id)
-    {
-    }
-
-    public Discipline ReadDisciplineById(int id)
-    {
-        return Discipline.CreateEntity(0, string.Empty);
-    }
-
-    public IEnumerable<Discipline> ReadDisciplines()
-    {
-        return []; 
+        _logger.LogInformation("Добавление объекта");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(discipline));
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryInsert = @"
+                INSERT INTO Disciplines (NameDiscipline)
+                VALUES (@NameDiscipline)";
+            connection.Execute(queryInsert, discipline);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при добавлении объекта");
+            throw;
+        }
     }
 
     public void UpdateDiscipline(Discipline discipline)
     {
+        _logger.LogInformation("Редактирование объекта");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(discipline));
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryUpdate = @"
+                UPDATE Disciplines
+                SET
+                    NameDiscipline=@NameDiscipline
+                WHERE Id=@Id";
+            connection.Execute(queryUpdate, discipline);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при редактировании объекта");
+            throw;
+        }
+    }
+
+    public void DeleteDiscipline(int id)
+    {
+        _logger.LogInformation("Удаление объекта");
+        _logger.LogDebug("Объект: {id}", id);
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryDelete = @"
+                DELETE FROM Disciplines
+                WHERE Id=@id";
+            connection.Execute(queryDelete, new { id });
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при удалении объекта");
+            throw;
+        }
+    }
+
+    public Discipline ReadDisciplineById(int id)
+    {
+        _logger.LogInformation("Получение объекта по идентификатору");
+        _logger.LogDebug("Объект: {id}", id);
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var querySelect = @"
+                SELECT * FROM Disciplines
+                WHERE Id=@id";
+            var discipline = connection.QueryFirst<Discipline>(querySelect, new { id });
+            _logger.LogDebug("Найденный объект: {json}", JsonConvert.SerializeObject(discipline));
+            return discipline;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при поиске объекта");
+            throw;
+        }
+    }
+
+    public IEnumerable<Discipline> ReadDisciplines()
+    {
+        _logger.LogInformation("Получение всех объектов");
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var querySelect = "SELECT * FROM Disciplines";
+            var disciplines = connection.Query<Discipline>(querySelect);
+            _logger.LogDebug("Полученные объекты: {json}", JsonConvert.SerializeObject(disciplines));
+            return disciplines;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при чтении объектов");
+            throw;
+        }
     }
 }
\ No newline at end of file
diff --git a/ProjectSchedule/ProjectSchedule/Repositories/Implementations/EducatorRepository.cs b/ProjectSchedule/ProjectSchedule/Repositories/Implementations/EducatorRepository.cs
index f189849..3763a97 100644
--- a/ProjectSchedule/ProjectSchedule/Repositories/Implementations/EducatorRepository.cs
+++ b/ProjectSchedule/ProjectSchedule/Repositories/Implementations/EducatorRepository.cs
@@ -1,28 +1,120 @@
-using ProjectSchedule.Entities;
+using Dapper;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
+using Npgsql;
+using ProjectSchedule.Entities;
 
 namespace ProjectSchedule.Repositories.Implementations;
 
 public class EducatorRepository : IEducatorRepository
 {
+    private readonly IConnectionString _connectionString;
+
+    private readonly ILogger<EducatorRepository> _logger;
+
+    public EducatorRepository(IConnectionString connectionString, ILogger<EducatorRepository> logger)
+    {
+        _connectionString = connectionString;
+        _logger = logger;
+    }
+
     public void CreateEducator(Educator educator)
     {
-    }
-
-    public void DeleteEducator(int id)
-    {
-    }
-
-    public Educator ReadEducatorById(int id)
-    {
-        return Educator.CreateEntity(0, string.Empty, string.Empty, string.Empty);
-    }
-
-    public IEnumerable<Educator> ReadEducators()
-    {
-        return [];
+        _logger.LogInformation("Добавление объекта");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(educator));
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryInsert = @"
+                INSERT INTO Educators (Surname, Name, Patronymic)
+                VALUES (@Surname, @Name, @Patronymic)";
+            connection.Execute(queryInsert, educator);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при добавлении объекта");
+            throw;
+        }
     }
 
     public void UpdateEducator(Educator educator)
     {
+        _logger.LogInformation("Редактирование объекта");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(educator));
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryUpdate = @"
+                UPDATE Educators
+                SET
+                    Surname=@Surname,
+                    Name=@Name,
+                    Patronymic=@Patronymic
+                WHERE Id=@Id";
+            connection.Execute(queryUpdate, educator);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при редактировании объекта");
+            throw;
+        }
+    }
+
+    public void DeleteEducator(int id)
+    {
+        _logger.LogInformation("Удаление объекта");
+        _logger.LogDebug("Объект: {id}", id);
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryDelete = @"
+                DELETE FROM Educators
+                WHERE Id=@id";
+            connection.Execute(queryDelete, new { id });
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при удалении объекта");
+            throw;
+        }
+    }
+
+    public Educator ReadEducatorById(int id)
+    {
+        _logger.LogInformation("Получение объекта по идентификатору");
+        _logger.LogDebug("Объект: {id}", id);
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var querySelect = @"
+                SELECT * FROM Educators
+                WHERE Id=@id";
+            var educator = connection.QueryFirst<Educator>(querySelect, new { id });
+            _logger.LogDebug("Найденный объект: {json}", JsonConvert.SerializeObject(educator));
+            return educator;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при поиске объекта");
+            throw;
+        }
+    }
+
+    public IEnumerable<Educator> ReadEducators()
+    {
+        _logger.LogInformation("Получение всех объектов");
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var querySelect = "SELECT * FROM Educators";
+            var educators = connection.Query<Educator>(querySelect);
+            _logger.LogDebug("Полученные объекты: {json}", JsonConvert.SerializeObject(educators));
+            return educators;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при чтении объектов");
+            throw;
+        }
     }
 }
\ No newline at end of file
diff --git a/ProjectSchedule/ProjectSchedule/Repositories/Implementations/GroupStudentsRepository.cs b/ProjectSchedule/ProjectSchedule/Repositories/Implementations/GroupStudentsRepository.cs
index 0a076ee..7b10c00 100644
--- a/ProjectSchedule/ProjectSchedule/Repositories/Implementations/GroupStudentsRepository.cs
+++ b/ProjectSchedule/ProjectSchedule/Repositories/Implementations/GroupStudentsRepository.cs
@@ -1,28 +1,120 @@
-using ProjectSchedule.Entities;
+using Dapper;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
+using Npgsql;
+using ProjectSchedule.Entities;
 
 namespace ProjectSchedule.Repositories.Implementations;
 
 public class GroupStudentsRepository : IGroupStudentsRepository
 {
+    private readonly IConnectionString _connectionString;
+
+    private readonly ILogger<GroupStudentsRepository> _logger;
+
+    public GroupStudentsRepository(IConnectionString connectionString, ILogger<GroupStudentsRepository> logger)
+    {
+        _connectionString = connectionString;
+        _logger = logger;
+    }
+
     public void CreateGroupStudents(GroupStudents groupStudents)
     {
-    }
-
-    public void DeleteGroupStudents(int id)
-    {
-    }
-
-    public GroupStudents ReadGroupStudentsById(int id)
-    {
-        return GroupStudents.CreateEntity(0, string.Empty, string.Empty, 0);
-    }
-
-    public IEnumerable<GroupStudents> ReadGroupsStudents()
-    {
-        return [];
+        _logger.LogInformation("Добавление объекта");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(groupStudents));
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryInsert = @"
+                INSERT INTO GroupsStudents (AbbreviationGroup, GroupNumber, QuantityStudents)
+                VALUES (@AbbreviationGroup, @GroupNumber, @QuantityStudents)";
+            connection.Execute(queryInsert, groupStudents);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при добавлении объекта");
+            throw;
+        }
     }
 
     public void UpdateGroupStudents(GroupStudents groupStudents)
     {
+        _logger.LogInformation("Редактирование объекта");
+        _logger.LogDebug("Объект: {json}", JsonConvert.SerializeObject(groupStudents));
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryUpdate = @"
+                UPDATE GroupsStudents
+                SET
+                    AbbreviationGroup=@AbbreviationGroup,
+                    GroupNumber=@GroupNumber,
+                    QuantityStudents=@QuantityStudents
+                WHERE Id=@Id";
+            connection.Execute(queryUpdate, groupStudents);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при редактировании объекта");
+            throw;
+        }
+    }
+
+    public void DeleteGroupStudents(int id)
+    {
+        _logger.LogInformation("Удаление объекта");
+        _logger.LogDebug("Объект: {id}", id);
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var queryDelete = @"
+                DELETE FROM GroupsStudents
+                WHERE Id=@id";
+            connection.Execute(queryDelete, new { id });
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при удалении объекта");
+            throw;
+        }
+    }
+
+    public GroupStudents ReadGroupStudentsById(int id)
+    {
+        _logger.LogInformation("Получение объекта по идентификатору");
+        _logger.LogDebug("Объект: {id}", id);
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var querySelect = @"
+                SELECT * FROM GroupsStudents
+                WHERE Id=@id";
+            var groupStudents = connection.QueryFirst<GroupStudents>(querySelect, new { id });
+            _logger.LogDebug("Найденный объект: {json}", JsonConvert.SerializeObject(groupStudents));
+            return groupStudents;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при поиске объекта");
+            throw;
+        }
+    }
+
+    public IEnumerable<GroupStudents> ReadGroupsStudents()
+    {
+        _logger.LogInformation("Получение всех объектов");
+        try
+        {
+            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
+            var querySelect = "SELECT * FROM GroupsStudents";
+            var groupsStudents = connection.Query<GroupStudents>(querySelect);
+            _logger.LogDebug("Полученные объекты: {json}", JsonConvert.SerializeObject(groupsStudents));
+            return groupsStudents;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Ошибка при чтении объектов");
+            throw;
+        }
     }
 }
\ No newline at end of file
diff --git a/ProjectSchedule/ProjectSchedule/appsettings.json b/ProjectSchedule/ProjectSchedule/appsettings.json
new file mode 100644
index 0000000..b91cc3c
--- /dev/null
+++ b/ProjectSchedule/ProjectSchedule/appsettings.json
@@ -0,0 +1,15 @@
+{
+  "Serilog": {
+    "Using": [ "Serilog.Sinks.File" ],
+    "MinimumLevel": "Debug",
+    "WriteTo": [
+      {
+        "Name": "File",
+        "Args": {
+          "path": "Logs/schedule_log.txt",
+          "rollingInterval": "Day"
+        }
+      }
+    ]
+  }
+}
\ No newline at end of file