Keihn, a defensive end and outside linebacker at Baltimore's The Gilman School, spoke to Nittany Lions coach Bill O'Brien on Monday and was offered.
"I've been talking to them for a while," Keihn said. "He's a really nice guy. He said I could help on the football field, but he also talked about the academics. It's a good academic school, and that's the No. 1 thing I'm interested in. And I know they're a good football team, but at the same time education comes first.
"I also know some kids out there and they say it's a really nice campus, the city is a very nice place."
Penn State was recruiting Keihn in the spring, but increased its pursuit of him recently, and one of the reasons is a move to outside linebacker as his primary position.
He speaks regularly with defensive line coach Larry Johnson and defensive coordinator John Butler, and both are telling Keihn he looks comfortable as a linebacker.
"I'm playing outside linebacker now, and coach Butler said he likes what he sees," Keihn said. "He said he likes how fast and physical I play. He said I could help them out and they like what I bring to the table. Coach Johnson said the same thing."
"I think I'm going to go up there and visit," he said. "I don't know when yet, but probably after my season."
The Gilman School is the same program that produced Penn State defensive lineman Brian Gaia and class of 2014 cornerback commit Troy Vincent Jr., who is recruiting his teammate and using a common theme.
"Troy said it's a very good school and that's why he likes it up there," Keihn said. "He said it's a very good place, and that's why he chose the school. He said he likes what they have to offer academically and football-wise."