diff --git a/specimen-igcse-prerelease.py b/specimen-igcse-prerelease.py
index 3581f57..7c91ce2 100644
--- a/specimen-igcse-prerelease.py
+++ b/specimen-igcse-prerelease.py
@@ -1,56 +1,62 @@
-# 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
+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
 
-# 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
-        # 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)
+            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:
+                    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))
\ No newline at end of file
+        # print average total for all students
+        print("Average total: %.2f" % (sum / 30))
+
+Prerelease_047802()
\ No newline at end of file