diff --git a/Polyclinic/PolyclinicBusinessLogic/BusinessLogics/CourseLogic.cs b/Polyclinic/PolyclinicBusinessLogic/BusinessLogics/CourseLogic.cs
index 090a167..d78f272 100644
--- a/Polyclinic/PolyclinicBusinessLogic/BusinessLogics/CourseLogic.cs
+++ b/Polyclinic/PolyclinicBusinessLogic/BusinessLogics/CourseLogic.cs
@@ -1,35 +1,105 @@
-using PolyclinicContracts.BindingModels;
+using Microsoft.Extensions.Logging;
+using PolyclinicContracts.BindingModels;
 using PolyclinicContracts.BusinessLogicsContracts;
 using PolyclinicContracts.SearchModels;
+using PolyclinicContracts.StoragesContracts;
 using PolyclinicContracts.ViewModels;
 
 namespace PolyclinicBusinessLogic.BusinessLogics
 {
     public class CourseLogic : ICourseLogic
     {
+        private ILogger _logger;
+        private ICourseStorage _courseStorage;
+
+        public CourseLogic(ILogger logger, ICourseStorage courseStorage)
+        {
+            _logger = logger;
+            _courseStorage = courseStorage;
+        }
+
         public bool Create(CourseBindingModel model)
         {
-            throw new NotImplementedException();
+            CheckModel(model);
+            if (_courseStorage.Insert(model) == null)
+            {
+                _logger.LogWarning("Insert operation failed");
+                return false;
+            }
+            return true;
         }
 
         public bool Delete(CourseBindingModel model)
         {
-            throw new NotImplementedException();
+            CheckModel(model, false);
+            _logger.LogInformation("Delete. Id:{Id}", model.Id);
+            if (_courseStorage.Delete(model) == null)
+            {
+                _logger.LogWarning("Delete operation failed");
+                return false;
+            }
+            return true;
         }
 
         public CourseViewModel? ReadElement(CourseSearchModel model)
         {
-            throw new NotImplementedException();
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            _logger.LogInformation("ReadElement. Id:{Id}", model.Id);
+            var element = _courseStorage.GetElement(model);
+            if (element == null)
+            {
+                _logger.LogWarning("ReadElement element not found");
+                return null;
+            }
+            _logger.LogInformation("ReadElement. Id:{Id}", element.Id);
+            return element;
         }
 
         public List<CourseViewModel>? ReadList(CourseSearchModel? model)
         {
-            throw new NotImplementedException();
+            _logger.LogInformation("ReadList. Id:{Id}", model?.Id);
+            var list = model == null ? _courseStorage.GetFullList() : _courseStorage.GetFilteredList(model);
+            if (list == null)
+            {
+                _logger.LogWarning("ReadList return null list");
+                return null;
+            }
+            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
+            return list;
         }
 
         public bool Update(CourseBindingModel model)
         {
-            throw new NotImplementedException();
+            CheckModel(model);
+            if (_courseStorage.Update(model) == null)
+            {
+                _logger.LogWarning("Update operation failed");
+                return false;
+            }
+            return true;
+        }
+        private void CheckModel(CourseBindingModel model, bool withParams = true)
+        {
+            if (model == null)
+            {
+                throw new ArgumentNullException(nameof(model));
+            }
+            if (!withParams)
+            {
+                return;
+            }
+            if (model.DaysCount < 1)
+            {
+                throw new ArgumentNullException("Количество дней приема должно быть больше нуля", nameof(model.DaysCount));
+            }
+            if (model.PillsPerDay < 1)
+            {
+                throw new ArgumentNullException("Количество препарата в день должно быть больше нуля", nameof(model.PillsPerDay));
+            }
+            _logger.LogInformation("Course. Id: {Id}", model.Id);
         }
     }
 }