There is a lot of competition for jobs in this economy. Many jobs that did not necessarily require a GED or high school equivalency diploma now do.
And what's happening is many of our adult learners who had a job and are now laid off have difficult landing one. Why? Because they do not have their high school diploma or GED.
For some getting the GED is a quick process, while for others it will take a little longer. In most cases, it is the math, reading, and writing that needs to be refreshed.... and many times learned for the first time.
How can you help? I have found that small group instruction works great! Just getting together as a group and having a "discussion" in whatever topic seems to help retention. And it is the student who returns again and again who will succeed.
I also think that having two different areas to study helps. Most of my students will stay to study at least 2 hours. Rather than spend the entire two hours on one subject, I split it in two. I also suggest to the student that they not only study via books but also via computer.