diff --git a/src/main/java/org/example/Administration.java b/src/main/java/org/example/Administration.java
index f760a50..4b8a8db 100644
--- a/src/main/java/org/example/Administration.java
+++ b/src/main/java/org/example/Administration.java
@@ -43,7 +43,7 @@ public class Administration {
      */
     public boolean deleteCourse(String courseID){
         for(Course course : courses){
-            if(course.getCourseCode().equals(courseID)){
+            if(course.getCourseID().equals(courseID)){
                 courses.remove(course);
                 return true;
             }
@@ -59,7 +59,7 @@ public class Administration {
      */
     public Course findCourseByID(String courseID){
         for(Course course : courses){
-            if(course.getCourseCode().equals(courseID)){
+            if(course.getCourseID().equals(courseID)){
                 return course;
             }
         }
diff --git a/src/main/java/org/example/Course.java b/src/main/java/org/example/Course.java
index 1714e77..ae4f2fe 100644
--- a/src/main/java/org/example/Course.java
+++ b/src/main/java/org/example/Course.java
@@ -16,10 +16,10 @@ public class Course {
     private String courseName;
 
     /** The code of the course. */
-    private String courseCode;
+    private String courseID;
 
     /** The credit value of the course. */
-    private int courseCredit;
+    private int courseCredits;
 
     /**
      * Constructs a new Course object with default values.
@@ -31,13 +31,13 @@ public class Course {
      * Constructs a new Course object with specified values.
      *
      * @param courseName   The name of the course.
-     * @param courseCode   The code of the course.
-     * @param courseCredit The credit value of the course.
+     * @param courseID   The code of the course.
+     * @param courseCredits The credit value of the course.
      */
-    public Course(String courseName, String courseCode, int courseCredit) {
+    public Course(String courseName, String courseID, int courseCredits) {
         this.courseName = courseName;
-        this.courseCode = courseCode;
-        this.courseCredit = courseCredit;
+        this.courseID = courseID;
+        this.courseCredits = courseCredits;
     }
 
     /**
@@ -63,17 +63,17 @@ public class Course {
      *
      * @return The code of the course.
      */
-    public String getCourseCode() {
-        return courseCode;
+    public String getCourseID() {
+        return courseID;
     }
 
     /**
      * Sets the code of the course.
      *
-     * @param courseCode The code of the course.
+     * @param courseID The code of the course.
      */
-    public void setCourseCode(String courseCode) {
-        this.courseCode = courseCode;
+    public void setCourseID(String courseID) {
+        this.courseID = courseID;
     }
 
     /**
@@ -81,17 +81,17 @@ public class Course {
      *
      * @return The credit value of the course.
      */
-    public int getCourseCredit() {
-        return courseCredit;
+    public int getCourseCredits() {
+        return courseCredits;
     }
 
     /**
      * Sets the credit value of the course.
      *
-     * @param courseCredit The credit value of the course.
+     * @param courseCredits The credit value of the course.
      */
-    public void setCourseCredit(int courseCredit) {
-        this.courseCredit = courseCredit;
+    public void setCourseCredits(int courseCredits) {
+        this.courseCredits = courseCredits;
     }
 
     /**
@@ -99,8 +99,8 @@ public class Course {
      */
     public void printCourseInfo() {
         System.out.println("Course Name: " + courseName);
-        System.out.println("Course Code: " + courseCode);
-        System.out.println("Course Credits: " + courseCredit);
+        System.out.println("Course Code: " + courseID);
+        System.out.println("Course Credits: " + courseCredits);
     }
 
     /**
@@ -172,7 +172,7 @@ public class Course {
     private static boolean courseExists(String filename, String name, String code) {
         List<Course> courses = readFromFile(filename);
         for (Course course : courses) {
-            if (course.getCourseName().equalsIgnoreCase(name) || course.getCourseCode().equalsIgnoreCase(code)) {
+            if (course.getCourseName().equalsIgnoreCase(name) || course.getCourseID().equalsIgnoreCase(code)) {
                 return true; // Course with the same name or code already exists
             }
         }
@@ -244,8 +244,8 @@ public class Course {
                 try (FileWriter writer = new FileWriter(filename)) {
                     for (Course course : courses) {
                         writer.write(course.getCourseName() + "\n");
-                        writer.write(course.getCourseCode() + "\n");
-                        writer.write(course.getCourseCredit() + "\n");
+                        writer.write(course.getCourseID() + "\n");
+                        writer.write(course.getCourseCredits() + "\n");
                         // Write any other fields you saved
                     }
                 } catch (IOException e) {
diff --git a/src/test/java/org/example/CourseTest.java b/src/test/java/org/example/CourseTest.java
index 704edaa..33510b6 100644
--- a/src/test/java/org/example/CourseTest.java
+++ b/src/test/java/org/example/CourseTest.java
@@ -63,7 +63,7 @@ class CourseTest {
         Course course = sampleCourse;
 
         // Write course data to the temporary file
-        course.writeToFile(course.getCourseName(), course.getCourseCode(), course.getCourseCredit(), TEMP_FILE);
+        course.writeToFile(course.getCourseName(), course.getCourseID(), course.getCourseCredits(), TEMP_FILE);
 
         // Read course data from the temporary file
         List<Course> courses = Course.readFromFile(TEMP_FILE);
@@ -72,8 +72,8 @@ class CourseTest {
         assertEquals(1, courses.size());
         Course readCourse = courses.get(0);
         assertEquals("Math", readCourse.getCourseName());
-        assertEquals("M101", readCourse.getCourseCode());
-        assertEquals(3, readCourse.getCourseCredit());
+        assertEquals("M101", readCourse.getCourseID());
+        assertEquals(3, readCourse.getCourseCredits());
 
         // Delete the temporary file
         deleteTempFile();
@@ -96,13 +96,13 @@ class CourseTest {
 
         Course course1 = courses.get(0);
         assertEquals("Math", course1.getCourseName());
-        assertEquals("C101", course1.getCourseCode());
-        assertEquals(3, course1.getCourseCredit());
+        assertEquals("C101", course1.getCourseID());
+        assertEquals(3, course1.getCourseCredits());
 
         Course course2 = courses.get(1);
         assertEquals("Science", course2.getCourseName());
-        assertEquals("C201", course2.getCourseCode());
-        assertEquals(4, course2.getCourseCredit());
+        assertEquals("C201", course2.getCourseID());
+        assertEquals(4, course2.getCourseCredits());
 
         // Delete the temporary file
         deleteTempFile();
@@ -112,8 +112,8 @@ class CourseTest {
     void addCourse() {
         // Create a new course
         String courseName = sampleCourse.getCourseName();
-        String courseCode = sampleCourse.getCourseCode();
-        int courseCredit = sampleCourse.getCourseCredit();
+        String courseCode = sampleCourse.getCourseID();
+        int courseCredit = sampleCourse.getCourseCredits();
 
         // Write course data to the temporary file
         Course.addCourse(courseName, courseCode, courseCredit, TEMP_FILE);
@@ -125,8 +125,8 @@ class CourseTest {
         assertEquals(1, courses.size());
         Course addedCourse = courses.get(0);
         assertEquals(courseName, addedCourse.getCourseName());
-        assertEquals(courseCode, addedCourse.getCourseCode());
-        assertEquals(courseCredit, addedCourse.getCourseCredit());
+        assertEquals(courseCode, addedCourse.getCourseID());
+        assertEquals(courseCredit, addedCourse.getCourseCredits());
 
         // Delete the temporary file
         deleteTempFile();
@@ -137,14 +137,14 @@ class CourseTest {
         // Write courses to the test file
         PrintWriter writer = new PrintWriter(new FileWriter(TEMP_FILE));
         writer.println(sampleCourse.getCourseName());
-        writer.println(sampleCourse.getCourseCode());
-        writer.println(sampleCourse.getCourseCredit());
+        writer.println(sampleCourse.getCourseID());
+        writer.println(sampleCourse.getCourseCredits());
         writer.println(sampleCourse2.getCourseName());
-        writer.println(sampleCourse2.getCourseCode());
-        writer.println(sampleCourse2.getCourseCredit());
+        writer.println(sampleCourse2.getCourseID());
+        writer.println(sampleCourse2.getCourseCredits());
         writer.println(sampleCourse3.getCourseName());
-        writer.println(sampleCourse3.getCourseCode());
-        writer.println(sampleCourse3.getCourseCredit());
+        writer.println(sampleCourse3.getCourseID());
+        writer.println(sampleCourse3.getCourseCredits());
         writer.close();
 
         // Simulate user input for course deletion