As Harlem Children's Zone moves to export its model nationwide, Obama's Promise Neighborhoods offer cautionary tales

Lack of reading material is not only a third-world problem – many poor families in the United States lack access to and funds for books. A program that helps get books to into the homes of low-income families can boost literacy, and help publishers, too.

How can rural African children learn to read when there are no books in their languages? Save the Children helps kids to create their own books, creating a homemade library for their village.

Delaware has been working to make sure that all college-ready graduates, regardless of socioeconomic status, make it to college. With financial reasons standing in the way of many qualified students, the state has worked on multiple levels to make this a possibility.

PowerMyLearning, a program that any student, parent, or teacher can use for free, helps students take ownership of their own learning. When most attention is being placed on teacher effectiveness, this program redirects those efforts toward students.

The overall graduation rate for black male students in New York City was 58 percent in 2014 - student retention rates are equally poor. But one school achieved a 100% on-time graduation rate last year, motivating their students with a student-founded, student-sustained 'fraternity'.

Attending college is not always a given option for gifted teenagers from less-than-wealthy backgrounds. National organization QuestBridge creates a way for low-income and minority high-achieving students to go to their dream colleges free of cost.

Palm Beach County, Florida has many of the same social problems that Philadelphia has, including “gangs, drugs, and poverty.” However, their school system has managed to keep students safe by employing “safe-school case managers” who build relationships with students, and they offer a youth court that is a system run by students who peer-review cases of unrest. The initiatives in this county has prevented school violence from happening without metal detectors and just two police officers.

Social-emotional learning (SEL) is transforming educational systems in Oakland by forming mentor relationships between adults and students. Unlike other models, though, the adults are the ones held accountable.

For-profit companies are making good private schools available even to Africa’s poor. They can do it – and can do it on an enormous scale – by hiring neighborhood residents to teach, and scripting out every word of every lesson on an e-reader.

AltSchools use a completely different education system - interconnecting technology and hands on experiments - to help students achieve a higher degree of learning. Students are grouped into small, personalized cohorts so they can be both mentors and mentees for their fellow peers, creating a collaborative learning space for all.