ABC This Week interviews during 2015: on Education

Ben Carson: Free medical care to fix primary care deficit

CARSON: I meant one of the things that happens, for instance, in Europe, for medical school, is that you don't have to pay for it. And, as a result, they don't have the skew that we have here. A lot of people, when they finish medical school, they're hundreds of thousands of dollars in debt. And instead of, you know, doing what they may have wanted to do, which was maybe be a primary care doctor, they decide that "I'd better become," you know, "one of the specialists that makes a lot more money so I can pay this money back." That's not an issue in Europe and they don't have this primary care deficit that we have.

Chris Christie: Free college is ludicrous, but we can reduce the cost

CHRISTIE: My alternative is we have to start to put market forces on these college costs. I pay for two college tuitions right now, and I can tell you that they're the most opaque bills you'll ever see in your life. If you got that bill for dinner with that little of that detail, you wouldn't pay it. You'd send it back. Yet for college, we pay it.

Q: What would you do as president?

CHRISTIE: Universities need to start telling us exactly what they're spending the money we give them on. And secondly, we need to unbundle those costs. So if a child doesn't want to pay for all of these different things in college, they should be able to select it. That will tell colleges what they don't need to provide and we shouldn't have to pay for. These ideas will help to contain costs, but the concept of free college for everybody -- there's nothing free in this world. We need to earn what we get.

Scott Walker: High school football is ok if practiced responsibly

WALKER: They did. Yes, wide receivers.

Q: You love football. But when you look at the concussions, when you look at what's happened, can you imagine saying to your grandchildren, 'yes, go do that'?

WALKER: I think in a state like Wisconsin, we actually have pretty good standards. My kids, even a few years ago, one of them had an early concussion, and was out for 10 days. They wouldn't let him back in until he had a full checkup. That actually should have happened a long time ago, and I'm hopeful other states around the country will do that. Because I think a lot of us enjoy football.

Q: If you were out there in Arizona?

WALKER: I'd be in Phoenix watching the Packers take on the Patriots, but I still think, like anything in life, there's ways of doing it that are responsible, and I still think football can be responsible in America.