Thanks. For now, we're using D as the low string, but I noticed that in some books, they say DAD, or GDG. Seeing these are guitar students and we've already learned G, C, and D chord on the guitar, I may go to that. But the scale degrees helped in Skip's answer, too. 1, 5, 5. Doesn't matter what notes we use as long as the intervals are correct.
My main problem was that in one book, they only told how to tune by setting the low string and then tuning the other strings from fretted notes on the low one... OK, but not great for beginners;
In another book, it had a few, but there were mistakes. It showed a keyboard with the notes, and it was labeled incorrectly.
In another, it had simple tunes and at the top it told the name of the tuning, but not how to tune it.
I don't have enough hair left to pull out, or I would have.
I've had these book since the '70s and '80s and hope maybe some good beginner books have been written since, but I'm starting with what I have because I already have them.
I've only been a member of this site for a week or two, and already I've had several of my questions answered. I appreciate everyone's help.
ms