diff --git a/University/Models/Teacher.cs b/University/Models/IStatement.cs
similarity index 59%
rename from University/Models/Teacher.cs
rename to University/Models/IStatement.cs
index edecbc6..bd4ccad 100644
--- a/University/Models/Teacher.cs
+++ b/University/Models/IStatement.cs
@@ -1,6 +1,6 @@
 namespace University.Models
 {
-    public class Teacher
+    public interface IStatement
     {
     }
 }
diff --git a/University/Models/Subject.cs b/University/Models/ISubject.cs
similarity index 55%
rename from University/Models/Subject.cs
rename to University/Models/ISubject.cs
index ae1bc37..a898013 100644
--- a/University/Models/Subject.cs
+++ b/University/Models/ISubject.cs
@@ -1,6 +1,6 @@
 namespace Models
 {
-    public class Subject
+    public interface ISubject
     {
 
     }
diff --git a/University/Models/Statement.cs b/University/Models/ITeacher.cs
similarity index 61%
rename from University/Models/Statement.cs
rename to University/Models/ITeacher.cs
index e16698c..5b56a5a 100644
--- a/University/Models/Statement.cs
+++ b/University/Models/ITeacher.cs
@@ -1,6 +1,6 @@
 namespace University.Models
 {
-    public class Statement
+    public interface ITeacher
     {
     }
 }