Back-to-school shopping is the second biggest consumer spending event each year, totaling $72.5 billion in spending for back-to-school and college supplies. Most shoppers start their research on smartphones and then continue on laptops or PCs. Common supplies for high school and college students include laptops, planners, binders, pens, highlighters, folders, graphing calculators, flash drives, pencils, hand sanitizer and more. Shoplet is an online retailer that specializes in back-to-school and office supplies.