Treehugger.com says it themselves!  (Of course the fountain pen they recommend doesn’t write the best on the recycled paper they also recommend.)

Who says you have to hit the mall? Here are some greener and cheaper alternatives.

5. Buy green. If you must go shopping for new items, choose paper made from 100 percent recycled content. Stick with wooden pencils that will biodegrade, instead of the plastic-sheathed ones that are impossible to recycle. An older student could perhaps be trusted with a refillable fountain pen. PaperMate’s ballpoint pen is made from 42 percent recycled material – not great, but better than nothing

https://www.treehugger.com/family/6-ways-escape-back-school-shopping-craze.html