Most GED prep programs are warm fuzzies.  Learners get a lot of 
emotional support and are not sanctioned if they come late or are 
absent. Rarely is there mandatory homework. No one "fails."  Post 
secondary is a hard contrast.  In many NJ community colleges, if you 
have  three un excused classes, you fail, and if you don't turn in 
your homework, it's a zero.  Thus post secondary is often a total 
discontinuity for GED prep graduates and that is a huge part of the problem.