I've now been teaching for 15 years overseas and have a few years experience in the US. I have used ISS every time I recruited. This means my confidential letter of recommendations in my ISS file is from over 15 years ago. While I'm 100% sure they were positive, they were written by my supervisors when I just started teaching. I just submitted non-confidential letters from my prinicipals every time I recruited in future years.

Do you think this makes a difference? (having my "beginning teacher" recommendations on file when I recruit). Is there a way to have ISS delete letters of recommendations from many years ago?