JOT IT DOWN: EcoPens from Uncommon Goods are made of corn starch instead of plastic. That means they’ll break down in a timely manner, once you’re ready to throw them away. What’s more, even the box they come in is recycled and printed with soy ink. Now that’s a smart, earth-friendly school supply. Perhaps you should share them with the class. GET IT: EcoPens (set of 12), $24. Available online from Uncommon Goods.