Superb "Heritage" backpack from Herschel, Classics line.
Ideal for courses, its large compartment can accommodate all sizes of documents. It has a large elasticated pocket for a 15" computer and a laptop pocket near the headphone exit.
It also has a practical front pocket with a carabiner for keys.
We like its leatherette details, which give this bag a vintage feel.
For more comfort, it has padded shoulder straps and a reinforced back.