Nondegree credentialing and training has existed for many years. Reasons for pursuing nondegree education vary, from wanting to pick up in-demand skills, meet a job requirement, or get a pay raise to exploring a new occupational area or engaging in lifelong learning. Having a nondegree credential is not unusual, either; one 2014 analysis by the US Census Bureau found that a quarter of all adults have a postsecondary certificate, industry certification, or professional license. Until recently, however, nationally representative information on nondegree credentials and training opportunities was sparse, a result of the federal government's long-standing focus on traditional educational sectors and degrees. This report--commissioned by the Opportunity America-AEI-Brookings Institution Working Class Study Group--explores new data from the US Department of Education's 2016 Adult Training and Education Survey (ATES) on nondegree credentials and work-experience programs for American adults. The report describes the prevalence and characteristics of nondegree education for the working class and the adult population at large. It explores questions such as: How widespread is nondegree education? Do adults complete nondegree credentials instead of or in addition to college degrees? What occupational fields are most common for these credentials? Do completers view their credentials as useful for getting a job or increasing skills and pay?