From the Sunshine Coast of South Africa to a remote ashram in India, Colvin and her husband have traveled around the world, visiting sixty–two countries and providing literacy training in twenty–six developing countries.

The founder of Literacy Volunteers of America, Inc., which later merged with other organizations to become ProLiteracy, Colvin was invited by universities, religious organizations, and the International Executive Service Corporation to share her skills in native language literacy and English as a second language training.

Along the way, Colvin met people from all walks of life—a holy man in India, a banned leader and a revolutionary in the apartheid system of South Africa, lepers in India and Madagascar, Chinese Communists who truly "serve the people," and survivors of Pol Pot’s Cambodia. In a richly varied and exciting career, Colvin’s most rewarding adventures were connecting with individuals from vastly different backgrounds and experiences, learning about their cultures and traditions, and discovering the many similarities all people share. Believing education is the key to facilitating communication and understanding among people around the world, Colvin, a lifelong learner herself, has dedicated her life to teaching others.