Sandra Costilla is a Public Translator of English (UNC) and holds a B.A. in English Language Teaching from Blas Pascal University, where she also tutors Discourse Competence: Listening in the B.A. in ELT program. She is currently pursuing an M.A. in Management in Education within Virtual Environments at the same institution. Sandra is head teacher at Coolsville English School and has over 25 years of experience teaching English in private schools and corporate settings.