We analyze the characteristics and outcomes of a Canadian foundational learning program's dropouts and compare them with those of the completers. We find significant heterogeneity within dropouts along two dimensions: when they drop out and why. Individuals whose characteristics have been historically associated with greater labour market barriers, and those with lower employability skills are more likely to complete the program. Individuals who face fewer barriers tend to leave at an early stage, while individuals without a high school degree tend to drop out later. Conditional on education, higher employability-skill participants are more likely to leave and return to school.