Barbara Hill-Moore is an opera singer and voice teacher who has been around the block a time or two.  From the inner-city projects of St. Louis, to the great opera houses of the world, she has been performing and teaching for decades!  She founded the group Spiritual Voices which performs African American spirituals and art song around the world.  She also created a foundation to help underprivileged students study voice: the Bruce R. Foote Memorial Scholarship Foundation.  

Check her out at 
http://footefoundation.org/
https://www.smu.edu/Meadows/AreasOfStudy/Music/Faculty/MooreBarbara