Who We Are: Old School Industries LLC is an Internet company based in San Francisco, CA, which owns and manages two consumer businesses: Quizlet.com and CollectorsWeekly.com. Quizlet is the leading study site for high school and college students in the U.S., and CollectorsWeekly.com is the leading web destination for people who are into vintage and antiques. http://quizlet.com/ http://collectorsweekly.com/