Teachers Pay Teachers (TPT) is an online marketplace where educators can buy, sell, and share their original educational resources. It's a platform that has revolutionized how teachers access and distribute educational content. Founded in 2006 by Paul Edelman, a New York City public school teacher, TPT was created to address...

Craigslist, a brainchild of Craig Newmark, commenced as an email distribution list to friends in the San Francisco Bay area in 1995. It featured local events, job listings, and other community-related information. The platform swiftly expanded, transitioning into a web-based service and extending its offerings. By 2000, it began catering...