The 5th edition of NCCER’s Core Curriculum has been in circulation for more than a year. I remember the 3rd edition because I was one of the volunteer authors. I was impressed with the group that brought a wide range of experience and knowledge to bear on helping put the finishing touches on the hard work done by NCCER and Pearson beforehand. This was in 2000 and going through each module I had flashbacks to my time at basic training in the US Army.