HSK, TOEFL, or Casual Chats? Let’s Nail Your Goals! TEFL-certified and fluent in 7+ languages, I specialize in exam prep (HSK/TOEFL) and lively conversations. Having taught in schools, I bridge textbooks with real-world fluency—think ordering *pastéis de nata* in Lisbon or debating in Mandarin. Whether you’re a beginner or polishing skills, let’s make progress *effortless* and fun!
Me as a Teacher
I love language in general and I speak several languages myself. I have taught English and Chinese in schools. I have TEFL language teaching certificate and can also help students with TOEFL or HSK studies. I also teach conversational Portuguese. In general I want to help students improve their language learning in the most efficient way possible. I am patient and always encourage you to speak and practice more. We can also use book materials to study if you want. I am happy to see you making every progress and I am always here to help! (Age 10+ only)
My lessons & teaching style
I think focusing on conversation is very important. We can have casual yet productive class environment. I can help students to correct pronunciation and grammar while discussing on different topics. I can also make simulations with students and practice in different real life situations. I want the language learning process to be practical and efficient. Also when it comes to new words or anything important, I like to write them down for students through text which can be quite helpful. I would also like to introduce students cultural background and history since they are super related with language. It can also make our class more fun. Besides that, using book material is also welcomed.
My teaching material
PDF file
Text Documents
Audio files
Image files
Video files
Articles and news
Graphs and charts
Certificates
CELPEBRAS (Portuguese Proficiency) - Brazilian ministry of Education - 2019
TEFEL/TESOL (ESL teaching) - CIEE - 2016
Education
2013 - 2017
Bachelor’s - SociologyState University of New York at Stony Brook
2021 - 2023
Master's - International RelationsUniversity of Milan
5.0
Rating
959
Students
7,665
Lessons
100%
Attendance rate
100%
Response rate
5.0
Rating
959
Students
7665
Lessons
100%
Attendance rate
100%
Response rate
English Lessons
English
Chinese (Mandarin)
Portuguese
Trial Lesson
501 lessons completed
USD 12.00+
Practical conversation
A2 - C2Conversation840 lessons completed
USD 12.50+
Package with 4% off
Pronunciation and Grammar
A2 - B2Language Essentials148 lessons completed
USD 12.50+
Package with 4% off
For Absolute Beginners / A1 level
A1 - A2Language Essentials31 lessons completed
USD 12.50+
Package with 4% off
Availability
Based on your timezone (UTC+00:00)
1,339 Reviews
All
English
Chinese (Mandarin)
Charise Courtney
123 Chinese (Mandarin) lessons
Teacher’s pick
Billy is wonderful teacher. He is so knowledgeable about so many topics and we are never without conversation topics. He always has fun lessons prepared and my daughter and I look forward to our weekly lessons and conversations. I highly recommend Billy he is one of the most friendly, kind, and intelligent people I’ve ever met. We have learned so much in such a short time about the language as well culture.
Jan 9, 2022
Brett Stephan
130 Chinese (Mandarin) lessons
Teacher’s pick
Billy 是最棒的! Whatever you would like to work on he is happy to help you with. His Mandarin and English are both perfect; he is also fluent in Portuguese and continues to study new languages! I have been taking Chinese lessons with Billy for 2 years and I have never had a problem. Super patient, great at explaining language and grammar questions, and he is a very well travelled!
May 21, 2020
Edo
12 Chinese (Mandarin) lessons
Consiglio vivamente di imparare con Billy.
Sto studiando cinese e sono partito da zero. Mi ha spiegato tutto chiaramente e rendendo le cose facili da imparare. È un insegnante molto bravo e paziente. Sono alla quinta lezione, mi ha già spigato un sacco di cose e continuerò sicuramente a fare lezione con lui. Consiglio! 👍🏻
Jul 13, 2025
Jack Y
177 Chinese (Mandarin) lessons
Teacher’s pick
Great lesson with billy. With just over two years of taking classes / practicing talking with him I have just passed hsk5. Billy makes Chinese fun to learn and interesting. We talk about a wide range of interesting topics. Thanks !
May 14, 2021
Will
4 Chinese (Mandarin) lessons
I really enjoy my classes with Billy. I was looking for an unstructured class where I can have a natural conversation, and Billy fully accommodates this.
Nov 14, 2025
erica castiglioni
3 English lessons
È piacevole chiacchierare con lui e ti corregge quando sbagli. Ti stimola a parlare. Lo consiglierei!