Question - How can I compare 2 different sets of students assessment marks, when they are all in the same class?
Answer - A good way to do this, is to create "Class Groups" within a class. Go to your My Subjects tab and click on your class, locate "Class groups" and click on this. Now all you need to do, is change one group of students to Class 2 and leave the rest as Class 1.
Now when you run the Markbook you will see "All Students" click on here to choose 1 or 2.
When you go to reports, look for the "Class Groups" dropdown and choose 1 or 2 from here.