Amelia runs a vocal technique program for professional youth, training children ages five to college age, together with her co-teachers, Gulnara Mitzanova, Liliana Sotirova and Glenn Gordon. 

Amelia’s students have appeared in countless theatrical productions. Her students have appeared on Broadway and/or Broadway National Tours of A Little Night Music, Beauty and the Beast, Billy Elliot, Bye Bye Birdie, Chitty Chitty Bang Bang!, Happiness, How the Grinch Stole Christmas, Joe Turner’s Come and Gone, Les Miserables, Ragtime, The Lion King, The Color Purple, Little House on the Prairie, Mary Poppins, The Miracle Worker, Peter Pan, Scrooge the Musical, Shrek, 13, West Side Story, White Christmas, Book of Mormon and more. Off-Broadway student credits include A Christmas Carol, American Girl Revue, American Girl Circle of Friends and A Christmas Story the Musical.

Her students have also been the voices for projects such as Barbie CDs, Backyardigans, Dora the Explorer, Go Diego Go, Kids Bop, etc.  Amelia also has written several songs and musicals for young audiences. These have been presented in the Professional Children's Theater Series, co-written and produced by Deb Roberts at the Cultural Department at the JCC on the Palisades.  As a performer, credits include:Cats (Grizabella & others), Les Miserables (Cosette and Ensemble), Evita (Eva Perone), Barber of Seville (Rosina),The Marriage of Figaro (Susanna), Un Ballo in Maschera (Oscar). Ms. DeMayo also provides Career Consulting to families with children seeking to work professionally.