Jeter's business ventures include a publishing partnership with Simon & Schuster and the Players' Tribune, an athlete-driven media website. He's currently raising $15 million for the Players Tribune through investors and a private stock sale.
STOPit Chief Executive Officer Todd Schobel declined to provide financial details of Jeter's investment, or the partnership with the Turn 2 Foundation.
App users tap here to watch a STOPit promotional video
A 2014 study by McAfee found that 87 per cent of US youth witnessed cyberbullying, largely due to appearance, race, religion or sexuality. It also found that 24 per cent wouldn't know what to do if they were bullied online.
"They live in the digital world, and unfortunately adults and educators don't always see what's going on," Schobel said in a telephone interview.
That's partially true for Jeter, 40, according to the president of his foundation, his sister Sharlee.
"We didn't have phones when we were in high school," Sharlee Jeter said in a telephone interview. "It's just a different world."
Founded in 2014, STOPit allows kids to capture and anonymously report online abuse via a free mobile app on Android or iPhone. Those reports are delivered to administrators immediately.
We're trying to feed off the peer-to-peer influence and how impactful students are among each other, instead of us as adults telling them.
More than 100 schools in 24 states signed up for the service during the 2014-15 school year, according to Schobel. The Bedminster, New Jersey, company expects to more than double its participating schools next year, he said, reaching from 300,000-500,000 students in at least six different countries.
The Turn 2 partnership will focus on the foundation's Jeter's Leaders program, comprised of high school students in New York and Michigan that are active in their communities and hoping to enact social change. They will serve as ambassadors for STOPit, Sharlee Jeter said.
"We're trying to feed off the peer-to-peer influence and how impactful students are among each other, instead of us as adults telling them," Jeter said in a telephone interview.
Derek Jeter began preparing for life after baseball early in his career, using relationships with PepsiCo CEO Indra Nooyi and basketball Hall of Famer Michael Jordan to gain insight into the business world. He has said he'd like to own a major-league baseball franchise one day.
"Derek knows what he's interested in doing and he's proactive," Sharlee Jeter said. "I'm sure there are a lot of opportunities down the road that will come up, but for now he's pretty busy."
- Bloomberg