Hi Sherry_verdi. First of all may I wish you a very belated welcome. I have not read any of your previous posts although I see that you have been a member for a whole year. I must have been
Nice to have another singing teacher here.
I would suggest that you sing some early music, some Purcell; Nymphs and Shepherds, transposed up a little is a great one for developing flexibility, or perhaps the very lovely Caccini Ave Maria as well as some of the beautiful Handel arias. O had I Jubal's Lyre (Jeptha) and Myself I Shall Adore. (Semele). These are nice when sung lightly. Then perhaps some of the easier Mozart ones: Batti, batti and Vedrai Carino. You can cheat a bit of course and transpose other songs up to suit your student's voice. When I do this I use the transpose feature on my digital piano or the Yammy keyboard if I want a lute or harpsichord sound. Micheal Head's Little Road to Bethlehem would work well in a higher key than those published.
Folk songs are always useful too and may be sung unaccompanied in any key.