About Ketlyn
Hello! Thank you for visiting my website. My name is Ketlyn Fernanda Leva. As an experienced English teacher, I have continuously enhanced my teaching skills through various professional training courses — because this dedication to ongoing development is what enables me to provide personalized lessons tailored to your specific needs.
Whether you're looking to develop your English fluency, prepare for exams, or advance your career, my purpose is to help you achieve your goals through my personalized English services. I have a deep belief that speaking and writing should come first — and everything I do at KFL Idiomas is built around that conviction.
My story
Fuelled by my passion for teaching English, I obtained a BA in English at Pontifical Catholic University of Campinas (PUC-Campinas) and spent a year as a special student in the Applied Linguistics Master's Programme at Unicamp. My qualifications include two prestigious certifications from Cambridge University: the ICELT (In-service Certificate in Language Teaching) and Module 1 of DELTA (Diploma in Teaching English to Speakers of Other Languages). I have also successfully achieved the C2 Proficiency Exam, the highest qualification demonstrating advanced English mastery.
This unique combination of skills, qualifications, and experience puts me in an ideal position to help you pursue your dreams and goals with KFL Idiomas. Since 2016, I have been empowering learners with dynamic, high-quality services designed to make advanced English mastery both practical and engaging.
1997
Started teaching English
Began my teaching career, quickly discovering that personalized-english-services-to-level-up-enged attention and real conversation practice make the biggest difference.
PUC-Campinas
BA in English
Built strong linguistic and pedagogical foundations at Pontifical Catholic University of Campinas.
Cambridge University
ICELT & DELTA Module 1
Earned two prestigious Cambridge teaching qualifications, deepening my understanding of methodology and advanced learner needs.
Unicamp
Applied Linguistics Master's Programme — Special Student
Spent a year as a special student in Unicamp's Applied Linguistics Master's course, deepening my understanding of how and why adults acquire language — insights that directly shape how I teach today.
Cambridge University
C2 Proficiency
Achieved the highest Cambridge English certificate — the same exam I help my own students prepare for.
2016
Founded KFL Idiomas
Launched a fully online English school focused exclusively on B2–C2 adult learners — live, personalized, and results-driven.
Today
3,000+ students helped
KFL Idiomas continues to grow, with students across Brazil and beyond reaching advanced fluency through live online classes.
How I teach
I prioritise speaking and writing from lesson one. Producing language helps you notice gaps in real time — something passive listening and reading simply cannot do. This is grounded in Merrill Swain's Output Hypothesis: producing language is not just a result of learning — it's a driver of it.
Every class is real-time, so I can correct your pronunciation, adjust the pace, and give you the immediate feedback that pre-recorded apps can never replicate.
Every lesson plan is yours alone — there are no one-size-fits-all courses here. Your goals, your pace, your schedule.
Drawing on Vygotsky's ZPD, I always push you just beyond your current level — enough to grow, never enough to overwhelm.
Fluency isn't a feeling — it's measurable. I help you set specific, trackable language goals so progress is visible and motivating.
I use authentic resources from Oxford University Press, Cambridge, and Pearson — alongside real-world texts and activities matched to your level and goals.
Before we begin our live online classes, I will have a meeting with you to assess your English level, understand your needs and goals, and create a personalized lesson plan tailored to help you achieve your targets. I also use top-quality materials from Oxford University Press, Cambridge University Press, and Pearson — ensuring you have access to the best resources available.
My mission
“To help you refine your English and achieve your goals — through personalized lessons, real-life practice, and a methodology grounded in Applied Linguistics.”
Book a free assessment — we'll discuss your level, your goals, and create a plan tailored to help you achieve them.
Book a free assessment on WhatsApp