Johnsley Mejustin is an accredited ESL teacher with over 10 years of experience helping students achieve their English goals. As the founder of Powerful English Institute, he has dedicated his career to designing lessons and activities that make learning English practical, effective, and exciting.

With a passion for helping learners sound more natural and confident, Johnsley has taught hundreds of students from around the world—both in-person and online. His unique teaching style focuses on real-world English, advanced vocabulary, and giving learners the tools they need to communicate like educated native speakers.

Word Up is a personal project- - a result of his years of teaching and his deep understanding of what English learners truly need. It’s more than a vocabulary book—it’s a guide to the kind of English students dream of speaking.