As already noted, the United States has achieved universal basic education at the primary school level, but it has not yet reached the point where all students obtain a high school diploma, which is now a necessity for gainful employment.

UNESCO: II Part Analytic Section

One reason for the relatively large high school completion rate is that the United States offers a number of "second chances" for students to obtain a high school diploma, including attendance at special school-based programs and obtaining a General Education Credential (GED) credential, usually by passing a high school equivalency examination.

UNESCO: II Part Analytic Section

But he hasn't used his prison time to obtain a GED, which is an alternative high school diploma, according to Robles and Peck.

CNN: STORY HIGHLIGHTS