It is not unusual for a GED student to have a bit of anxiety. For many students, their past educational experience had not been a positive one.
Many remember a time when all they experienced was negativity from teachers and "F's". To put themselves in the forefront, go to school/learning center, and take a test/s..... takes a lot of courage and self determination!
Remember to continually praise your students and encourage them throughout the GED testing process. Getting positive reinforcement goes along way.... and everyone needs and craves it.... regardless of age.
The GED Test has changed in January 2014 and they might have even more anxiety. It is a more rigorous and difficult test. It requires solid reading skills as well as computer skills.
If they (your students) are anxious.... start out simple and build on their current skills.