The nicest fountain pen for neat writing is the Rotring Art Pen Fine nib. Uses ink cartridges - the small ones. You can buy online. Does cost about £10-£12 though. I bought one each for DD1 and 2 Unfortunately it is such a nice pen that DD2s class mates kept trying to borrow it and it went missing
I have had mine for 25 years! Wallpaper samples make sturdy book backing if you don't have to have sticky plastic and geog books look good backed in old maps or large travel type leaflets. Several teachers asked for the books to be backed "creatively" (usually only in Y7 by Y9 I don't think they expect too much like that!) The ink eraser pens are a godsend and plastic wallets and those card document wallets keep homework flat and clean.
I don't know anyone who doesn't like browsing for stationery! Although back to school ads in the hols still make me shudder from being a child.