diff --git a/specimen-igcse-prereleases.py b/specimen-igcse-prereleases.py
index 7c91ce2..7d088ec 100644
--- a/specimen-igcse-prereleases.py
+++ b/specimen-igcse-prereleases.py
@@ -1,62 +1,59 @@
-class Prerelease_047802:
-    def __init__(self):
-        Prerelease_047802.prerelease(self)
-    def prerelease(self):
-        # define lists for all required data
-        student_names = []
-        test_1_marks = []
-        test_2_marks = []
-        test_3_marks = []
-        total_marks = []
-        # define number of students to record data for
-        number_of_students = 30
-        # define variable for storing total marks gained by all students overall
-        sum = 0
+def prerelease_047802:
+    # define lists for all required data
+    student_names = []
+    test_1_marks = []
+    test_2_marks = []
+    test_3_marks = []
+    total_marks = []
+    # define number of students to record data for
+    number_of_students = 30
+    # define variable for storing total marks gained by all students overall
+    sum = 0
 
-        # function for prompting user for input, then checking it against conditions
-        def getMark(test_number, student_index, max_mark):
-            # keep asking for the mark until a valid mark is entered
-            mark = None
-            while not mark:
-                # ask for mark of given student, for given test number
-                mark = input("%s test %d mark: " % (student_names[student_index], test_number))
-                # check if mark is given and that it's numeric
-                if (mark and mark.isnumeric()):
-                    # check mark is in acceptable range of values
-                    if (int(mark) < 0 or int(mark) > max_mark):
-                        mark = None
-                else:
+    # function for prompting user for input, then checking it against conditions
+    def getMark(test_number, student_index, max_mark):
+        # keep asking for the mark until a valid mark is entered
+        mark = None
+        while not mark:
+            # ask for mark of given student, for given test number
+            mark = input("%s test %d mark: " % (student_names[student_index], test_number))
+            # check if mark is given and that it's numeric
+            if (mark and mark.isnumeric()):
+                # check mark is in acceptable range of values
+                if (int(mark) < 0 or int(mark) > max_mark):
                     mark = None
-                # if input is invalid, print error message
-                if not mark:
-                    print("Invalid input. Please enter a number between 0 and %d." % max_mark)
-            # return mark
-            return int(mark)
+            else:
+                mark = None
+            # if input is invalid, print error message
+            if not mark:
+                print("Invalid input. Please enter a number between 0 and %d." % max_mark)
+        # return mark
+        return int(mark)
 
-        # do this for all students
-        for i in range(number_of_students):
-            # retrieve and store student's name
-            student_names.append(input("Student %d name: " % (i + 1)))
+    # do this for all students
+    for i in range(number_of_students):
+        # retrieve and store student's name
+        student_names.append(input("Student %d name: " % (i + 1)))
 
-        # do this for all students
-        for i in range(number_of_students):
-            # retrieve and store student's test marks
-            # test #1 has a max mark of 20
-            test_1_marks.append(getMark(1, i, 20))
-            # test #2 has a max mark of 25
-            test_2_marks.append(getMark(2, i, 25))
-            # test #3 has a max mark of 35
-            test_3_marks.append(getMark(3, i, 35))
-            # record student's total marks
-            total_marks.append(test_1_marks[i] + test_2_marks[i] + test_3_marks[i])
-            # add student's total marks to sum of all marks gained by all students overall
-            sum += total_marks[-1]
+    # do this for all students
+    for i in range(number_of_students):
+        # retrieve and store student's test marks
+        # test #1 has a max mark of 20
+        test_1_marks.append(getMark(1, i, 20))
+        # test #2 has a max mark of 25
+        test_2_marks.append(getMark(2, i, 25))
+        # test #3 has a max mark of 35
+        test_3_marks.append(getMark(3, i, 35))
+        # record student's total marks
+        total_marks.append(test_1_marks[i] + test_2_marks[i] + test_3_marks[i])
+        # add student's total marks to sum of all marks gained by all students overall
+        sum += total_marks[-1]
 
-        # print each student's total marks
-        for i in range(number_of_students):
-            print("%s: %d" % (student_names[i], total_marks[i]))
+    # print each student's total marks
+    for i in range(number_of_students):
+        print("%s: %d" % (student_names[i], total_marks[i]))
 
-        # print average total for all students
-        print("Average total: %.2f" % (sum / 30))
+    # print average total for all students
+    print("Average total: %.2f" % (sum / 30))
 
-Prerelease_047802()
\ No newline at end of file
+prerelease_047802()
\ No newline at end of file