diff --git a/School/School.sln b/School/School.sln
index e433f48..218fc09 100644
--- a/School/School.sln
+++ b/School/School.sln
@@ -9,6 +9,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SchoolDataModels", "Schools
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SchoolContracts", "SchoolContracts\SchoolContracts.csproj", "{D58B0AFE-E28D-4583-B9F1-C0EDF443243F}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SchoolBusinessLogic", "SchoolBusinessLogic\SchoolBusinessLogic.csproj", "{E78D42A3-7FA0-4E3A-B0C8-AEC70B3EE331}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -27,6 +29,10 @@ Global
 		{D58B0AFE-E28D-4583-B9F1-C0EDF443243F}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{D58B0AFE-E28D-4583-B9F1-C0EDF443243F}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{D58B0AFE-E28D-4583-B9F1-C0EDF443243F}.Release|Any CPU.Build.0 = Release|Any CPU
+		{E78D42A3-7FA0-4E3A-B0C8-AEC70B3EE331}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E78D42A3-7FA0-4E3A-B0C8-AEC70B3EE331}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E78D42A3-7FA0-4E3A-B0C8-AEC70B3EE331}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E78D42A3-7FA0-4E3A-B0C8-AEC70B3EE331}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/School/SchoolBusinessLogic/BusinessLogic/AchievementLogic.cs b/School/SchoolBusinessLogic/BusinessLogic/AchievementLogic.cs
new file mode 100644
index 0000000..4c14e0e
--- /dev/null
+++ b/School/SchoolBusinessLogic/BusinessLogic/AchievementLogic.cs
@@ -0,0 +1,111 @@
+using Microsoft.Extensions.Logging;
+using SchoolContracts.BindingModels;
+using SchoolContracts.BusinessLogicsContracts;
+using SchoolContracts.SearchModels;
+using SchoolContracts.StoragesContracts;
+using SchoolContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SchoolBusinessLogic.BusinessLogic
+{
+    public class AchievementLogic : IAchievementLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IAchievementStorage _AchievementStorage;
+
+        public AchievementLogic(ILogger<AchievementLogic> logger, IAchievementStorage AchievementStorage)
+        {
+            _logger = logger;
+            _AchievementStorage = AchievementStorage;
+        }
+
+        public List<AchievementViewModel>? ReadList(AchievementSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. Name:{Name} AchievementId:{Id}", model?.Name, model?.Id);
+            var list = model == null ? _AchievementStorage.GetFullList() : _AchievementStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        public AchievementViewModel? ReadElement(AchievementSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement.Id:{ Id}", model.Id);
+            var element = _AchievementStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+            return element;
+        }
+
+
+
+        public bool Create(AchievementBindingModel model)
+        {
+            CheckModel(model);
+            if (_AchievementStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+
+        }
+
+        public bool Update(AchievementBindingModel model)
+        {
+            CheckModel(model);
+            if (_AchievementStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Delete(AchievementBindingModel model)
+        {
+            CheckModel(model);
+            _logger.LogInformation("Delete. Id:{Id}", model.Id);
+            if (_AchievementStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        private void CheckModel(AchievementBindingModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (string.IsNullOrEmpty(model.Name))
+            {
+                throw new ArgumentNullException("Нет названия достижения",
+               nameof(model.Name));
+            }
+            if (string.IsNullOrEmpty(model.Description))
+            {
+                throw new ArgumentNullException("Нет описания достижения",
+               nameof(model.Description));
+            }
+            _logger.LogInformation("Achievement. Id:{Id}. LessonId:{LessonId}. Name:{Name}. Description:{Description} .ReceiptDate{ReceiptDate}", model.Id, model.LessonId, model.Name, model.Description, model.ReceiptDate);
+        }
+    }
+}
diff --git a/School/SchoolBusinessLogic/BusinessLogic/InterestLogic.cs b/School/SchoolBusinessLogic/BusinessLogic/InterestLogic.cs
new file mode 100644
index 0000000..fb80c02
--- /dev/null
+++ b/School/SchoolBusinessLogic/BusinessLogic/InterestLogic.cs
@@ -0,0 +1,117 @@
+using Microsoft.Extensions.Logging;
+using SchoolContracts.BindingModels;
+using SchoolContracts.BusinessLogicsContracts;
+using SchoolContracts.SearchModels;
+using SchoolContracts.StoragesContracts;
+using SchoolContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SchoolBusinessLogic.BusinessLogic
+{
+        public class InterestLogic : IInterestLogic
+        {
+            private readonly ILogger _logger;
+            private readonly IInterestStorage _InterestStorage;
+            public InterestLogic(ILogger<InterestLogic> logger, IInterestStorage
+           InterestStorage)
+            {
+                _logger = logger;
+                _InterestStorage = InterestStorage;
+            }
+            public List<InterestViewModel>? ReadList(InterestSearchModel? model)
+            {
+                _logger.LogInformation("ReadList. InterestName:{InterestName}.Id:{ Id}", model?.Name, model?.Id);
+                var list = model == null ? _InterestStorage.GetFullList() :
+        _InterestStorage.GetFilteredList(model);
+                if (list == null)
+                {
+                    _logger.LogWarning("ReadList return null list");
+                    return null;
+                }
+                _logger.LogInformation("ReadList. Count:{Count}", list?.Count);
+                return list;
+            }
+            public InterestViewModel? ReadElement(InterestSearchModel model)
+            {
+                if (model == null)
+                {
+                    throw new ArgumentNullException(nameof(model));
+                }
+                _logger.LogInformation("ReadElement. InterestName:{InterestName}.Id:{ Id}", model.Name, model.Id);
+                var element = _InterestStorage.GetElement(model);
+                if (element == null)
+                {
+                    _logger.LogWarning("ReadElement element not found");
+                    return null;
+                }
+                _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+                return element;
+            }
+            public bool Create(InterestBindingModel model)
+            {
+                CheckModel(model);
+                if (_InterestStorage.Insert(model) == null)
+                {
+                    _logger.LogWarning("Insert operation failed");
+                    return false;
+                }
+                return true;
+            }
+            public bool Update(InterestBindingModel model)
+            {
+                CheckModel(model);
+                if (_InterestStorage.Update(model) == null)
+                {
+                    _logger.LogWarning("Update operation failed");
+                    return false;
+                }
+                return true;
+            }
+            public bool Delete(InterestBindingModel model)
+            {
+                CheckModel(model, false);
+                _logger.LogInformation("Delete. Id:{Id}", model.Id);
+                if (_InterestStorage.Delete(model) == null)
+                {
+                    _logger.LogWarning("Delete operation failed");
+                    return false;
+                }
+                return true;
+            }
+            private void CheckModel(InterestBindingModel model, bool withParams =
+           true)
+            {
+                if (model == null)
+                {
+                    throw new ArgumentNullException(nameof(model));
+                }
+                if (!withParams)
+                {
+                    return;
+                }
+                if (string.IsNullOrEmpty(model.Name))
+                {
+                    throw new ArgumentNullException("Нет названия интереса",
+                   nameof(model.Name));
+                }
+                if (string.IsNullOrEmpty(model.Direction))
+                {
+                        throw new ArgumentNullException("Нет направления интереса",
+                    nameof(model.Direction));
+                }
+                _logger.LogInformation("Interest. InterestName:{InterestName}.Direction:{Direction}. Id: { Id}", model.Name, model.Direction, model.Id);
+                var element = _InterestStorage.GetElement(new InterestSearchModel
+                {
+                    Name = model.Name
+                });
+                if (element != null && element.Id != model.Id)
+                {
+                    throw new InvalidOperationException("Интерес с таким названием уже есть");
+                }
+            }
+    }
+    }
diff --git a/School/SchoolBusinessLogic/BusinessLogic/LessonLogic.cs b/School/SchoolBusinessLogic/BusinessLogic/LessonLogic.cs
new file mode 100644
index 0000000..f275182
--- /dev/null
+++ b/School/SchoolBusinessLogic/BusinessLogic/LessonLogic.cs
@@ -0,0 +1,107 @@
+using Microsoft.Extensions.Logging;
+using SchoolContracts.BindingModels;
+using SchoolContracts.BusinessLogicsContracts;
+using SchoolContracts.SearchModels;
+using SchoolContracts.StoragesContracts;
+using SchoolContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SchoolBusinessLogic.BusinessLogic
+{
+    public class LessonLogic : ILessonLogic
+    {
+        private readonly ILogger _logger;
+        private readonly ILessonStorage _LessonStorage;
+
+        public LessonLogic(ILogger<LessonLogic> logger, ILessonStorage LessonStorage)
+        {
+            _logger = logger;
+            _LessonStorage = LessonStorage;
+        }
+
+        public List<LessonViewModel>? ReadList(LessonSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. LessonId:{Id}", model?.Id);
+            var list = model == null ? _LessonStorage.GetFullList() : _LessonStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
+        }
+
+        public LessonViewModel? ReadElement(LessonSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement.Id:{ Id}", model.Id);
+            var element = _LessonStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+            return element;
+        }
+
+        
+
+        public bool Create(LessonBindingModel model)
+        {
+            CheckModel(model);
+            if (_LessonStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+
+        }
+
+        public bool Update(LessonBindingModel model)
+        {
+            CheckModel(model);
+            if (_LessonStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Delete(LessonBindingModel model)
+        {
+            CheckModel(model);
+            _logger.LogInformation("Delete. Id:{Id}", model.Id);
+            if (_LessonStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+
+        private void CheckModel(LessonBindingModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (model.TimeStart >= model.TimeEnd)
+            {
+                throw new ArgumentNullException("Занятие должно начинаться раньше чем заканчивается");
+            }
+            _logger.LogInformation("Lesson. Id:{Id}. UserId:{UserId}. TimeStart:{TimeStart}. TimeEnd:{TimeEnd}", model.Id, model.UserId, model.TimeStart, model.TimeEnd);
+        }
+
+
+    }
+}
diff --git a/School/SchoolBusinessLogic/BusinessLogic/UserLogic.cs b/School/SchoolBusinessLogic/BusinessLogic/UserLogic.cs
new file mode 100644
index 0000000..5ec89c1
--- /dev/null
+++ b/School/SchoolBusinessLogic/BusinessLogic/UserLogic.cs
@@ -0,0 +1,127 @@
+using Microsoft.Extensions.Logging;
+using SchoolContracts.BindingModels;
+using SchoolContracts.BusinessLogicsContracts;
+using SchoolContracts.SearchModels;
+using SchoolContracts.StoragesContracts;
+using SchoolContracts.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SchoolBusinessLogic.BusinessLogic
+{
+    public class UserLogic : IUserLogic
+    {
+        private readonly ILogger _logger;
+        private readonly IUserStorage _UserStorage;
+        public UserLogic(ILogger<UserLogic> logger, IUserStorage
+       UserStorage)
+        {
+            _logger = logger;
+            _UserStorage = UserStorage;
+        }
+        public List<UserViewModel>? ReadList(UserSearchModel? model)
+        {
+            _logger.LogInformation("ReadList. UserName:{UserName}.Id:{ Id}", model?.Name, model?.Id);
+            var list = model == null ? _UserStorage.GetFullList() :
+    _UserStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list?.Count);
+            return list;
+        }
+        public UserViewModel? ReadElement(UserSearchModel model)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. UserName:{Name}.Id:{ Id}", model.Name, model.Id);
+            var element = _UserStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+            return element;
+        }
+        public bool Create(UserBindingModel model)
+        {
+            CheckModel(model);
+            if (_UserStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Update(UserBindingModel model)
+        {
+            CheckModel(model);
+            if (_UserStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+        public bool Delete(UserBindingModel model)
+        {
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. Id:{Id}", model.Id);
+            if (_UserStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
+        }
+        private void CheckModel(UserBindingModel model, bool withParams =
+       true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (string.IsNullOrEmpty(model.Name))
+            {
+                throw new ArgumentNullException("Нет имени пользователя",
+               nameof(model.Name));
+            }
+            if (string.IsNullOrEmpty(model.Mail))
+            {
+                throw new ArgumentNullException("Нет электронной почты",
+               nameof(model.Mail));
+            }
+            if (string.IsNullOrEmpty(model.PhoneNumber))
+            {
+                throw new ArgumentNullException("Нет номера телефона",
+               nameof(model.PhoneNumber));
+            }
+            if (string.IsNullOrEmpty(model.Password))
+            {
+                throw new ArgumentNullException("Нет пароля пользователя",
+               nameof(model.Password));
+            }
+            _logger.LogInformation("User. UserName:{UserName}.Birthdate:{ BirthDate}. Mail:{ Mail}. PhoneNumber{ PhoneNumber} Id: { Id}", model.Name, model.BirthDate, model.Mail, model.PhoneNumber, model.Id);
+            var element = _UserStorage.GetElement(new UserSearchModel
+            {
+                Name = model.Name
+            });
+            if (element != null && element.Id != model.Id)
+            {
+                throw new InvalidOperationException("Пользователь с таким именем уже есть");
+            }
+        }
+    }
+}
diff --git a/School/SchoolBusinessLogic/SchoolBusinessLogic.csproj b/School/SchoolBusinessLogic/SchoolBusinessLogic.csproj
new file mode 100644
index 0000000..d8e0d45
--- /dev/null
+++ b/School/SchoolBusinessLogic/SchoolBusinessLogic.csproj
@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="8.0.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\SchoolContracts\SchoolContracts.csproj" />
+  </ItemGroup>
+
+</Project>