An excellent book that has an excellent chapter about adults novices learning dance is:-
Kimmerle M & Côté-Laurence P  Teaching Dance Skills A Motor Learning and Development Approach New Jersey J Michael Ryan Publishing
It is the sort of book that every dance teacher should have and dip into regularly. I recommend it to the teachers in my training and development work (including all the BBO teachers I worked with when l was a lecturer on the first two years of the new teaching qualifications).
Advice re teaching adults, treat each of them as a person as well as a dance student. Help them to flourish through their dance activities by helping them to enjoy and benefit from learning to dance. Reward effort as well as progress and involve them in the learning process by encouraging the asking of questions.
My website www.decodanz.co.uk
is being updated at the moment but it will soon have regular teaching development information and teaching tips on it so you might want to check it out from time to time for relevant info.
Enjoy your adults - it's a whole new way of teaching, learning and sharing dance.