diff --git a/data/RemoteData/DAO/Group.cs b/data/RemoteData/DAO/Group.cs
index c0a336d..6c79c13 100644
--- a/data/RemoteData/DAO/Group.cs
+++ b/data/RemoteData/DAO/Group.cs
@@ -8,9 +8,10 @@ namespace Data.RemoteData.DAO
 {
     public class GroupDao
     {
-        public int Id { get; set; }
-        public string Name { get; set; }
+        internal static List<GroupDao> Name = new List<GroupDao>();
 
-        public virtual IEnumerable<UserDao> Users { get; set; }
+        public int Id { get; set; }
+        public required string GroupName { get; set; }
+        public IEnumerable<UserDao> Users { get; set; }
     }
 }
diff --git a/data/RemoteData/DAO/Presence.cs b/data/RemoteData/DAO/Presence.cs
index 2f7e116..3d09ade 100644
--- a/data/RemoteData/DAO/Presence.cs
+++ b/data/RemoteData/DAO/Presence.cs
@@ -6,14 +6,13 @@ using System.Threading.Tasks;
 
 namespace Data.RemoteData.DAO
 {
-    internal class PresenceDao
-    {
+    public class PresnceDao
+{
+
         public Guid UserGuid { get; set; }
-        public bool IsAttedance { get; set; } = true;
-        public DateOnly Date { get; set; }
-
-        public int LessonNumber { get; set; }
-
-        public virtual UserDao UserDao { get; set; }
-    }
+    public bool IsAttendensy { get; set; } = true;
+    public int LessonNumber { get; set; }
+    public DateOnly Date {  get; set; }
+    public UserDao userDao { get; set; }
+}
 }
diff --git a/data/RemoteData/RemoteDataBaseContext.cs b/data/RemoteData/RemoteDataBaseContext.cs
index e9cc580..4977c56 100644
--- a/data/RemoteData/RemoteDataBaseContext.cs
+++ b/data/RemoteData/RemoteDataBaseContext.cs
@@ -7,7 +7,7 @@ namespace data.RemoteData
     {
         internal DbSet<GroupDao> Group { get; set; }
         internal DbSet<UserDao> User { get; set; }
-        internal DbSet<PresenceDao> Presence { get; set; }
+        internal DbSet<PresnceDao> Presence { get; set; }
 
         protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
         {
@@ -18,9 +18,9 @@ namespace data.RemoteData
         {
             modelBuilder.Entity<GroupDao>().HasKey(group => group.Id);
             modelBuilder.Entity<UserDao>().HasKey(user => user.Guid);
-            modelBuilder.Entity<PresenceDao>().HasKey(presence => new {
+            modelBuilder.Entity<PresnceDao>().HasKey(presence => new {
                 presence.UserGuid,
-                presence.IsAttedance,
+                presence.IsAttendensy,
                 presence.Date,
                 presence.LessonNumber,
             });
diff --git a/data/Repository/SQLGroupRepositoryImpl.cs b/data/Repository/SQLGroupRepositoryImpl.cs
index 986bf84..a48569c 100644
--- a/data/Repository/SQLGroupRepositoryImpl.cs
+++ b/data/Repository/SQLGroupRepositoryImpl.cs
@@ -20,7 +20,7 @@ namespace Data.Repository
 
         public bool AddGroup(GroupLocalEntity newGroup)
         {
-            GroupDao groupDao = new GroupDao { Name = newGroup.Name };
+            GroupDao groupDao = new GroupDao { GroupName = newGroup.Name };
             var result = _remoteDataBaseContext.Group.Add(groupDao);
             if (result != null) { 
                 _remoteDataBaseContext.SaveChanges();
@@ -32,7 +32,7 @@ namespace Data.Repository
         {
             return _remoteDataBaseContext.Group.Select(group => new GroupLocalEntity{ 
                 Id = group.Id, 
-                Name = group.Name}
+                Name = group.GroupName}
                 ).ToList();
         }
 
diff --git a/data/bin/Debug/net8.0/data.dll b/data/bin/Debug/net8.0/data.dll
index 3ad7dfd..b5e10fc 100644
Binary files a/data/bin/Debug/net8.0/data.dll and b/data/bin/Debug/net8.0/data.dll differ
diff --git a/data/bin/Debug/net8.0/data.pdb b/data/bin/Debug/net8.0/data.pdb
index aeaf682..f307fd9 100644
Binary files a/data/bin/Debug/net8.0/data.pdb and b/data/bin/Debug/net8.0/data.pdb differ
diff --git a/data/obj/Debug/net8.0/data.AssemblyInfo.cs b/data/obj/Debug/net8.0/data.AssemblyInfo.cs
index b21bbce..6b5667c 100644
--- a/data/obj/Debug/net8.0/data.AssemblyInfo.cs
+++ b/data/obj/Debug/net8.0/data.AssemblyInfo.cs
@@ -13,7 +13,7 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyCompanyAttribute("data")]
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+5124d95d3daae0a4fb8c67dff74fc5e25268f700")]
 [assembly: System.Reflection.AssemblyProductAttribute("data")]
 [assembly: System.Reflection.AssemblyTitleAttribute("data")]
 [assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
diff --git a/data/obj/Debug/net8.0/data.AssemblyInfoInputs.cache b/data/obj/Debug/net8.0/data.AssemblyInfoInputs.cache
index 26b3a26..f7d7a56 100644
--- a/data/obj/Debug/net8.0/data.AssemblyInfoInputs.cache
+++ b/data/obj/Debug/net8.0/data.AssemblyInfoInputs.cache
@@ -1 +1 @@
-6741393a5fe1cc20988265f6fd0e8bdd33ee4b9cc7b9e110a41e548fdd825a94
+f79085eebfdd7035c27d101a32916355d93e5f513df432f9a3075f4253aa1b2c
diff --git a/data/obj/Debug/net8.0/data.dll b/data/obj/Debug/net8.0/data.dll
index 3ad7dfd..b5e10fc 100644
Binary files a/data/obj/Debug/net8.0/data.dll and b/data/obj/Debug/net8.0/data.dll differ
diff --git a/data/obj/Debug/net8.0/data.pdb b/data/obj/Debug/net8.0/data.pdb
index aeaf682..f307fd9 100644
Binary files a/data/obj/Debug/net8.0/data.pdb and b/data/obj/Debug/net8.0/data.pdb differ
diff --git a/data/obj/Debug/net8.0/ref/data.dll b/data/obj/Debug/net8.0/ref/data.dll
index 7267c75..b7b478d 100644
Binary files a/data/obj/Debug/net8.0/ref/data.dll and b/data/obj/Debug/net8.0/ref/data.dll differ
diff --git a/data/obj/Debug/net8.0/refint/data.dll b/data/obj/Debug/net8.0/refint/data.dll
index 7267c75..b7b478d 100644
Binary files a/data/obj/Debug/net8.0/refint/data.dll and b/data/obj/Debug/net8.0/refint/data.dll differ
diff --git a/domain/UseCase/UseCasePresence.cs b/domain/UseCase/UseCasePresence.cs
new file mode 100644
index 0000000..455518e
--- /dev/null
+++ b/domain/UseCase/UseCasePresence.cs
@@ -0,0 +1,44 @@
+using Data.RemoteData.DAO;
+namespace Data.domain.UseCase
+{
+    internal class UseCasePresence
+    {
+        private List<PresnceDao> attendanceRecords;
+
+        public UseCasePresence(List<PresnceDao> attendanceRecords)
+        {
+            this.attendanceRecords = attendanceRecords;
+        }
+
+        public List<PresnceDao> GetAttendanceByGroup(string groupNumber)
+        {
+            return attendanceRecords.Where(record => record.userDao.Group.GroupName == groupNumber).ToList();
+        }
+
+        public List<PresnceDao> GetAttendanceByGroupAndDate(string groupNumber, DateOnly date)
+        {
+            return attendanceRecords.Where(record => record.userDao.Group.GroupName == groupNumber && record.Date == date).ToList();
+        }
+
+        public void MarkUserAsAbsent(string groupNumber, int firstLesson, int lastLesson, DateOnly date)
+        {
+            foreach (var lesson in Enumerable.Range(firstLesson, lastLesson - firstLesson + 1))
+            {
+                var record = attendanceRecords.FirstOrDefault(r => r.userDao.Group.GroupName == groupNumber && r.LessonNumber == lesson && r.Date == date);
+                if (record != null)
+                {
+                    record.IsAttendensy = false;
+                }
+            }
+        }
+
+        public void MarkUserAsAbsentForWeek(string groupNumber, int firstLesson, int lastLesson, DateOnly startDate)
+        {
+            foreach (var day in Enumerable.Range(0, 7))
+            {
+                var date = startDate.AddDays(day);
+                MarkUserAsAbsent(groupNumber, firstLesson, lastLesson, date);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/domain/bin/Debug/net8.0/data.dll b/domain/bin/Debug/net8.0/data.dll
index 3ad7dfd..b5e10fc 100644
Binary files a/domain/bin/Debug/net8.0/data.dll and b/domain/bin/Debug/net8.0/data.dll differ
diff --git a/domain/bin/Debug/net8.0/data.pdb b/domain/bin/Debug/net8.0/data.pdb
index aeaf682..f307fd9 100644
Binary files a/domain/bin/Debug/net8.0/data.pdb and b/domain/bin/Debug/net8.0/data.pdb differ
diff --git a/domain/bin/Debug/net8.0/domain.dll b/domain/bin/Debug/net8.0/domain.dll
index 4b92364..01b9861 100644
Binary files a/domain/bin/Debug/net8.0/domain.dll and b/domain/bin/Debug/net8.0/domain.dll differ
diff --git a/domain/bin/Debug/net8.0/domain.pdb b/domain/bin/Debug/net8.0/domain.pdb
index 84087b8..222daa3 100644
Binary files a/domain/bin/Debug/net8.0/domain.pdb and b/domain/bin/Debug/net8.0/domain.pdb differ
diff --git a/domain/obj/Debug/net8.0/domain.AssemblyInfo.cs b/domain/obj/Debug/net8.0/domain.AssemblyInfo.cs
index 996ffe7..ab7ec48 100644
--- a/domain/obj/Debug/net8.0/domain.AssemblyInfo.cs
+++ b/domain/obj/Debug/net8.0/domain.AssemblyInfo.cs
@@ -13,7 +13,7 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyCompanyAttribute("domain")]
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+5124d95d3daae0a4fb8c67dff74fc5e25268f700")]
 [assembly: System.Reflection.AssemblyProductAttribute("domain")]
 [assembly: System.Reflection.AssemblyTitleAttribute("domain")]
 [assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
diff --git a/domain/obj/Debug/net8.0/domain.AssemblyInfoInputs.cache b/domain/obj/Debug/net8.0/domain.AssemblyInfoInputs.cache
index 191d5d4..1a37bb1 100644
--- a/domain/obj/Debug/net8.0/domain.AssemblyInfoInputs.cache
+++ b/domain/obj/Debug/net8.0/domain.AssemblyInfoInputs.cache
@@ -1 +1 @@
-50afef9105125301dd1c05ea9fb1e5f605a3f79c6aca753bbf0156749546e4dd
+9c029f0b724d07a712a5d941d1aa11410bfa94baebf4624d9063852c950ebe3f
diff --git a/domain/obj/Debug/net8.0/domain.csproj.AssemblyReference.cache b/domain/obj/Debug/net8.0/domain.csproj.AssemblyReference.cache
index 82c3725..3152d7d 100644
Binary files a/domain/obj/Debug/net8.0/domain.csproj.AssemblyReference.cache and b/domain/obj/Debug/net8.0/domain.csproj.AssemblyReference.cache differ
diff --git a/domain/obj/Debug/net8.0/domain.csproj.CoreCompileInputs.cache b/domain/obj/Debug/net8.0/domain.csproj.CoreCompileInputs.cache
index 303d420..e3ddab3 100644
--- a/domain/obj/Debug/net8.0/domain.csproj.CoreCompileInputs.cache
+++ b/domain/obj/Debug/net8.0/domain.csproj.CoreCompileInputs.cache
@@ -1 +1 @@
-06e54d2e250f99be5b9c0d574f3c9686446bd7b207bc068308acbd6c108463f7
+dde64b0792f50fd0b7b79f917c9fba1b6079d6bb705e8b58d3634905ee7db9c7
diff --git a/domain/obj/Debug/net8.0/domain.dll b/domain/obj/Debug/net8.0/domain.dll
index 4b92364..01b9861 100644
Binary files a/domain/obj/Debug/net8.0/domain.dll and b/domain/obj/Debug/net8.0/domain.dll differ
diff --git a/domain/obj/Debug/net8.0/domain.pdb b/domain/obj/Debug/net8.0/domain.pdb
index 84087b8..222daa3 100644
Binary files a/domain/obj/Debug/net8.0/domain.pdb and b/domain/obj/Debug/net8.0/domain.pdb differ
diff --git a/domain/obj/Debug/net8.0/ref/domain.dll b/domain/obj/Debug/net8.0/ref/domain.dll
index 885137c..ca4ed68 100644
Binary files a/domain/obj/Debug/net8.0/ref/domain.dll and b/domain/obj/Debug/net8.0/ref/domain.dll differ
diff --git a/domain/obj/Debug/net8.0/refint/domain.dll b/domain/obj/Debug/net8.0/refint/domain.dll
index 885137c..ca4ed68 100644
Binary files a/domain/obj/Debug/net8.0/refint/domain.dll and b/domain/obj/Debug/net8.0/refint/domain.dll differ
diff --git a/ui/bin/Debug/net8.0/data.dll b/ui/bin/Debug/net8.0/data.dll
index 3ad7dfd..b5e10fc 100644
Binary files a/ui/bin/Debug/net8.0/data.dll and b/ui/bin/Debug/net8.0/data.dll differ
diff --git a/ui/bin/Debug/net8.0/data.pdb b/ui/bin/Debug/net8.0/data.pdb
index aeaf682..f307fd9 100644
Binary files a/ui/bin/Debug/net8.0/data.pdb and b/ui/bin/Debug/net8.0/data.pdb differ
diff --git a/ui/bin/Debug/net8.0/domain.dll b/ui/bin/Debug/net8.0/domain.dll
index 4b92364..01b9861 100644
Binary files a/ui/bin/Debug/net8.0/domain.dll and b/ui/bin/Debug/net8.0/domain.dll differ
diff --git a/ui/bin/Debug/net8.0/domain.pdb b/ui/bin/Debug/net8.0/domain.pdb
index 84087b8..222daa3 100644
Binary files a/ui/bin/Debug/net8.0/domain.pdb and b/ui/bin/Debug/net8.0/domain.pdb differ
diff --git a/ui/bin/Debug/net8.0/ui.dll b/ui/bin/Debug/net8.0/ui.dll
index aa7f3c7..072ca01 100644
Binary files a/ui/bin/Debug/net8.0/ui.dll and b/ui/bin/Debug/net8.0/ui.dll differ
diff --git a/ui/bin/Debug/net8.0/ui.exe b/ui/bin/Debug/net8.0/ui.exe
index 24b119f..94bedc3 100644
Binary files a/ui/bin/Debug/net8.0/ui.exe and b/ui/bin/Debug/net8.0/ui.exe differ
diff --git a/ui/bin/Debug/net8.0/ui.pdb b/ui/bin/Debug/net8.0/ui.pdb
index 25ff982..a951c9d 100644
Binary files a/ui/bin/Debug/net8.0/ui.pdb and b/ui/bin/Debug/net8.0/ui.pdb differ
diff --git a/ui/obj/Debug/net8.0/apphost.exe b/ui/obj/Debug/net8.0/apphost.exe
index 24b119f..94bedc3 100644
Binary files a/ui/obj/Debug/net8.0/apphost.exe and b/ui/obj/Debug/net8.0/apphost.exe differ
diff --git a/ui/obj/Debug/net8.0/ref/ui.dll b/ui/obj/Debug/net8.0/ref/ui.dll
index 57e6a92..9334961 100644
Binary files a/ui/obj/Debug/net8.0/ref/ui.dll and b/ui/obj/Debug/net8.0/ref/ui.dll differ
diff --git a/ui/obj/Debug/net8.0/refint/ui.dll b/ui/obj/Debug/net8.0/refint/ui.dll
index 57e6a92..9334961 100644
Binary files a/ui/obj/Debug/net8.0/refint/ui.dll and b/ui/obj/Debug/net8.0/refint/ui.dll differ
diff --git a/ui/obj/Debug/net8.0/ui.AssemblyInfo.cs b/ui/obj/Debug/net8.0/ui.AssemblyInfo.cs
index eca84b8..27b2969 100644
--- a/ui/obj/Debug/net8.0/ui.AssemblyInfo.cs
+++ b/ui/obj/Debug/net8.0/ui.AssemblyInfo.cs
@@ -13,10 +13,10 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyCompanyAttribute("ui")]
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+5124d95d3daae0a4fb8c67dff74fc5e25268f700")]
 [assembly: System.Reflection.AssemblyProductAttribute("ui")]
 [assembly: System.Reflection.AssemblyTitleAttribute("ui")]
 [assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
 
-// Generated by the MSBuild WriteCodeFragment class.
+// Создано классом WriteCodeFragment MSBuild.
 
diff --git a/ui/obj/Debug/net8.0/ui.AssemblyInfoInputs.cache b/ui/obj/Debug/net8.0/ui.AssemblyInfoInputs.cache
index 04da69e..7fdb980 100644
--- a/ui/obj/Debug/net8.0/ui.AssemblyInfoInputs.cache
+++ b/ui/obj/Debug/net8.0/ui.AssemblyInfoInputs.cache
@@ -1 +1 @@
-20ed1ba88db46bd37bf95cc037aa54d55b6a60c0405520a36b7f26aec1c3e1fe
+949b5e9c101aeb5918553be7acfbb6a7908a62a118405d2f2df4707237ffb8cf
diff --git a/ui/obj/Debug/net8.0/ui.csproj.AssemblyReference.cache b/ui/obj/Debug/net8.0/ui.csproj.AssemblyReference.cache
index 5062822..fa12482 100644
Binary files a/ui/obj/Debug/net8.0/ui.csproj.AssemblyReference.cache and b/ui/obj/Debug/net8.0/ui.csproj.AssemblyReference.cache differ
diff --git a/ui/obj/Debug/net8.0/ui.dll b/ui/obj/Debug/net8.0/ui.dll
index aa7f3c7..072ca01 100644
Binary files a/ui/obj/Debug/net8.0/ui.dll and b/ui/obj/Debug/net8.0/ui.dll differ
diff --git a/ui/obj/Debug/net8.0/ui.pdb b/ui/obj/Debug/net8.0/ui.pdb
index 25ff982..a951c9d 100644
Binary files a/ui/obj/Debug/net8.0/ui.pdb and b/ui/obj/Debug/net8.0/ui.pdb differ