diff --git a/SchoolAgainStudy/SchoolAgainStudy.sln b/SchoolAgainStudy/SchoolAgainStudy.sln
index 48bbc41..0321d8d 100644
--- a/SchoolAgainStudy/SchoolAgainStudy.sln
+++ b/SchoolAgainStudy/SchoolAgainStudy.sln
@@ -3,7 +3,9 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.5.33414.496
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SchoolAgainStudy", "SchoolAgainStudy\SchoolAgainStudy.csproj", "{4D41BF0A-F462-45D6-9488-C11CB7711E34}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SchoolAgainStudy", "SchoolAgainStudy\SchoolAgainStudy.csproj", "{4D41BF0A-F462-45D6-9488-C11CB7711E34}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SchoolAgainStudyDataModels", "SchoolAgainStudyDataModels\SchoolAgainStudyDataModels.csproj", "{F4F2EDE5-975A-4A60-8C1F-9AEF303AC0B3}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -15,6 +17,10 @@ Global
 		{4D41BF0A-F462-45D6-9488-C11CB7711E34}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{4D41BF0A-F462-45D6-9488-C11CB7711E34}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{4D41BF0A-F462-45D6-9488-C11CB7711E34}.Release|Any CPU.Build.0 = Release|Any CPU
+		{F4F2EDE5-975A-4A60-8C1F-9AEF303AC0B3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F4F2EDE5-975A-4A60-8C1F-9AEF303AC0B3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F4F2EDE5-975A-4A60-8C1F-9AEF303AC0B3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F4F2EDE5-975A-4A60-8C1F-9AEF303AC0B3}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/SchoolAgainStudy/SchoolAgainStudyDataModels/IId.cs b/SchoolAgainStudy/SchoolAgainStudyDataModels/IId.cs
new file mode 100644
index 0000000..31e667f
--- /dev/null
+++ b/SchoolAgainStudy/SchoolAgainStudyDataModels/IId.cs
@@ -0,0 +1,7 @@
+namespace SchoolAgainStudyDataModels
+{
+    public interface IId
+    {
+        int Id { get; }
+    }
+}
\ No newline at end of file
diff --git a/SchoolAgainStudy/SchoolAgainStudyDataModels/Models/ILesson.cs b/SchoolAgainStudy/SchoolAgainStudyDataModels/Models/ILesson.cs
new file mode 100644
index 0000000..63c041f
--- /dev/null
+++ b/SchoolAgainStudy/SchoolAgainStudyDataModels/Models/ILesson.cs
@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SchoolAgainStudyDataModels.Models
+{
+    public interface ILesson : IId
+    {
+        string Title { get; }
+        DateTime DateEvent { get; }
+        int ProductId { get; }
+        string ProductName { get; }
+        int TeacherId { get; }
+        Dictionary<int, IMaterial> LessonMaterials { get; }
+
+    }
+}
diff --git a/SchoolAgainStudy/SchoolAgainStudyDataModels/Models/IMaterial.cs b/SchoolAgainStudy/SchoolAgainStudyDataModels/Models/IMaterial.cs
new file mode 100644
index 0000000..a6610ab
--- /dev/null
+++ b/SchoolAgainStudy/SchoolAgainStudyDataModels/Models/IMaterial.cs
@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SchoolAgainStudyDataModels.Models
+{
+    public interface IMaterial : IId
+    {
+        string Title { get; }
+        string SphereUse { get; }
+    }
+}
diff --git a/SchoolAgainStudy/SchoolAgainStudyDataModels/Models/ITask.cs b/SchoolAgainStudy/SchoolAgainStudyDataModels/Models/ITask.cs
new file mode 100644
index 0000000..949abb2
--- /dev/null
+++ b/SchoolAgainStudy/SchoolAgainStudyDataModels/Models/ITask.cs
@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SchoolAgainStudyDataModels.Models
+{
+    public interface ITask : IId
+    {
+        string Title { get; }
+        DateTime DateIssue { get; }
+        DateTime DateDelivery { get; }
+        int TeacherId { get; }
+        Dictionary<int, IMaterial> TaskMaterials { get; }
+    }
+}
diff --git a/SchoolAgainStudy/SchoolAgainStudyDataModels/Models/ITeacher.cs b/SchoolAgainStudy/SchoolAgainStudyDataModels/Models/ITeacher.cs
new file mode 100644
index 0000000..21bfbd3
--- /dev/null
+++ b/SchoolAgainStudy/SchoolAgainStudyDataModels/Models/ITeacher.cs
@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SchoolAgainStudyDataModels.Models
+{
+    public interface ITeacher : IId
+    {
+        string Name { get; }
+        string Post { get; }
+        string Phone { get; }
+        string Login { get; }
+        string Password { get; }
+        Dictionary<int, IMaterial> TeacherMaterials { get; }
+    }
+}
diff --git a/SchoolAgainStudy/SchoolAgainStudyDataModels/SchoolAgainStudyDataModels.csproj b/SchoolAgainStudy/SchoolAgainStudyDataModels/SchoolAgainStudyDataModels.csproj
new file mode 100644
index 0000000..132c02c
--- /dev/null
+++ b/SchoolAgainStudy/SchoolAgainStudyDataModels/SchoolAgainStudyDataModels.csproj
@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>