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diff --git a/myApp_Class_Inheritance_University.js b/myApp_Class_Inheritance_University.js
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+class University {
+    //creates instance of University with properties name, city, and ranking
+    constructor(name, country, ranking, numStudents) {
+        this.name = name;
+        this.country = country;
+        this.ranking = ranking;
+        this.numStudents = numStudents;
+
+    }
+
+    //increments numStudents by 1
+    MoreStudents() {
+        this.numStudents++;
+    }
+}
+
+class Public_University extends University {
+    //creates instance of Public_University with University properites plus Careers an array of strings
+    constructor(name, country, ranking, numStudents, Careers) {
+        super(name, country, ranking, numStudents);
+        this.Careers = Careers;
+    }
+}
+
+class Private_University extends University {
+    //creates instance of Private_University with University properties plus DoubleMajor, a boolean value
+    constructor(name, country, ranking, numStudents, DoubleMajor = true) {
+        super(name, country, ranking, numStudents);
+        this.DoubleMajor = DoubleMajor;
+    }
+
+     //Offer double major.  If the University offer a double major, changes DoubleMajor to false, if they don't offer double major, prints message to console.
+     OtherMajor() {
+        if(this.DoubleMajor) {
+            this.DoubleMajor = false;
+        } else {
+            console.log('We are sorry. We do not offer double major in our careers')
+        }
+    }
+}
+
+//Testing the classes by instantiating them, calling each method, and verifying output
+//Database https://www.timeshighereducation.com/impactrankings#!/page/0/length/25/sort_by/rank/sort_order/asc/cols/undefined
+
+//creating instances of each class
+let university = new University('University of Auckland', 'New Zeland', 1, 42000);
+let public_university = new Public_University('University of São Paulo', 'Brazil',  14, 82000, ['Art & Humanities', 'Clinical, Pre-Clinical & Health', 'Engineering &Technology', 'Life Sciences', 'Social Sciences', 'Physical Sciences']);
+let private_university = new Private_University('Arizona State University (Tempe)', 'United States', 5, 45000, true);
+
+//logging each instance
+console.log(university);
+console.log(public_university);
+console.log(private_university);
+
+//calling the method from the parent class to ensure it works as expected
+university.MoreStudents();
+public_university.MoreStudents();
+private_university.MoreStudents();
+
+//logging the objects after calling .MoreStudents() to verify it worked as intended
+console.log(university);
+console.log(public_university);
+console.log(private_university);
+
+//calling .OtherMajor()
+private_university.OtherMajor();
+
+//checking that .DoubleMajor() when DoubleMajor == true works as expected
+console.log(private_university);
+
+//checking that .OtherMajor() when DoubleMajor == false works as expected
+private_university.OtherMajor();
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