Let me chime in here too.
Many academic institutions love paper, and completing formal evaluations seems to fit the ethos of many schools and adult students. It's natural for students to want to see their progress documented. Likewise, schools often require documentation of student progress for their accrediting agencies too. Translation: here come the formal reports!
Benchmarks and instructor feedback remain valuable - even in adult education and casual IEP programs.
Yet the most critical evaluation remains student experiences. Videotaping student performances - in mock job interviews, class discussions, presentations, and even conversations - is a very powerful teaching tool. Students can see their own progress.
Let me suggest one more method: give adult students real world assignments outside the safe zone of the ESL class. I assign, for instance, informational interviews where students must interview someone who has a job that they want to have. This assignment requires considerable preparation, but the payoff can be huge. Students have a chance to gain insider information on potential jobs, test their language skills, and usually receive real world validation of their progress.
If you are interested in informational interviews, here are some useful links.
Vanderbilt University, an elite private university in Tennessee, has compiled an impressive list of 60 informational interviews from a wide variety of disciplines and professions. (Peabody is a leading school of Education within Vanderbilt University). These provide illuminating examples of real-life informational interviews. Note: some speakers have a strong southern accent.
http://streams.peabody.vanderbilt.edu/h ... _field.htm
Here’s a solid collection of typical informational interview questions from About.com, a fairly reliable New York Times-owned website. Questions are divided into Occupational and Functional categories.
http://jobsearch.about.com/od/infointer ... vquest.htm
Here’s a basic video, perhaps targeted for adult education and community college students, that reviews the fundamentals of conducting an informational interview.
http://education-portal.com/videos/Cond ... Video.html
Good luck and let's embrace student desires to see their progress documented!