diff --git a/Class/ClassTest/main.py b/Class/ClassTest/main.py
index cb2be4b..b52af32 100644
--- a/Class/ClassTest/main.py
+++ b/Class/ClassTest/main.py
@@ -1,5 +1,37 @@
 import os
 
-class Test:
-    def __init__(self):
-        
\ No newline at end of file
+class Student:
+    def __init__(self, name_, age_, grades_ ):
+        self.name = name_
+        self.age = age_
+        self.grades = grades_
+    def add_grade(self, grade):
+        self.grades.append(grade)
+    def average(self):
+        sum = 0
+        for i in range(len(self.grades)):
+            sum += self.grades[i]
+        sum /= len(self.grades)
+        return sum
+    def show_info(self):
+        print("Name:", self.name, "Age:", self.age, "Grades:", self.grades)
+class MaleStudent(Student):
+    def __init__(self,  name_, age_, grades_ ):
+        self.gender = "Male"
+        self.name = name_
+        self.age = age_
+        self.grades = grades_
+    def show_info(self):
+        print("Gender: ", self.gender, "Name:", self.name, "Age:", self.age, "Grades:", self.grades)
+    def show_gender(self):
+        print("Gender: ", self.gender)
+
+x = Student("Van", 20, [100, 100, 98, 100])
+x.show_info()
+print(x.average())
+x.add_grade(90)
+x.show_info()
+print(x.average())
+y = MaleStudent("Van", 20, [100, 100, 98, 100])
+y.show_info()
+y.show_gender()
\ No newline at end of file