The other thing to be careful about is that there are TWO units.html files in various places. I put up some of the Michigan homework sets and my students couldn't figure out the units because the link didn't work. I found units.html, put it in the right place, and then found that I had one that had different unit abbreviations than the ones used in the Michigan set. The correct one for this set is in
I can't find the other file now. Maybe I overwrote it. (Possibly helpfiles/Units.html?)
Anyway, it would be nice if the UNIts were UNIfied for the entire NPL.
Mostly the two sets are the same, but for example one file uses year and the other uses yr. I don't know what problem sets use the other file.