Craig Ogelby worked in Pennsylvania public schools for about 40 years before calling it quits in 2007. He regretted it almost instantly. Just one month after retiring, he took a new job as a principal in New Jersey. “I really just did not think through my decision to retire,” says Ogelby, now 72 and working as a consultant. “I thought I was ready, but I soon realized that I need to continue to be active.”
Image: "I thought I was ready, but I soon realized that I need to continue to be active."—Craig Ogelby, 72, a longtime educator whose retirement lasted just one month before he went right back to work in a new school Illustration by Adrià Fruitós for TIME