Jean L. Arnold earned an MA in Linguistics. She has taught ESOL and ESOL methodology in Spain, the US, China, Vietnam, Canada and New Zealand. Jean teaches at Victoria University of Wellington.

Emily Herrick has taught ESL for nearly 25 years and has been listening to music for even longer. She holds MAs in TESL and History, and has taught in Arizona, Costa Rica, and the Philippines. She currently teaches at the University of Nebraska-Lincoln.