As crazy as it sounds, it's almost September, and for anyone who is still a student, that means it's time to go back to school. On the bright side, it also means it's time for back-to-school shopping! It's a great time to stock up on all of the must-have wardrobe staples you can wear year-round. Thanks to Google, we have the perfect style advice on the latest trends to buy for the upcoming school year, especially when it comes to footwear. It turns out the most popular shoe style, according to Google shopping data, is the Birkenstock sandals. Once an intimidating '90s trend, these practical slides have become a classic in the modern woman's wardrobe. They're the perfect item for a busy students to keep you comfortable and stylish all day long.