Cambridge Assessment English
CELTA
The Certificate in English Language Teaching to Adults: 120 hours of classroom-based teacher training.
About GrammarMetric A teacher who codes. A school that measures.
GrammarMetric is one teacher, a small classroom in Bangkapi, and a stack of software built for the students in it. You will always know who is teaching you.
Hi, I'm Charlie.
My full name is Charles Davis. I am a CELTA-certified IELTS and exam preparation teacher from the United States, with an MBA from Syracuse University.
GrammarMetric is my own school. My classroom is in the Santisuk English School building in Bangkapi, Bangkok, and I work in partnership with Santisuk. I teach English and IELTS, and I build the learning games my students train with. GrammarMetric is the whole system: honest placement, small live classes, and practice tools that students actually open at home.
Everyone is welcome here, whatever your first language. Students come from across Bangkok: Thai and Chinese speakers, expats, working professionals, university students and school pupils. Classes are taught in English from the first lesson, at the level you actually are.
- Every class is mine. You are not handed to a rotating pool of teachers between terms.
- Placement is honest. I will tell you if you are not ready for the class you asked for.
- The tools are built here. When a student needs something that does not exist, I write it.
- Progress is measured. Scores from day one to end of term, not vibes.
Certified to teach. Trained to measure.
Cambridge teacher training, a business degree, and years of helping students get into university, before I started teaching in Bangkok.
Syracuse University
MBA
A Master of Business Administration. It shapes the Business English lessons, and the habit of measuring progress in numbers.
Marking
IELTS band descriptors
I map each student's work against the public IELTS band descriptors, so you can see exactly which criteria are holding your score back.
A1 to C1
Teaching in Bangkok
Many years of teaching English in Bangkok, in groups and one-to-one, from beginner (A1) to advanced (C1).
Four years
University admissions
Four years in US university admissions, advising applicants on entry requirements, including English language requirements.
Four years
Data analysis
Four years as a data analyst, leading data governance and training client teams. It is why progress here is a number, not a feeling.
Come and see the room.
In-person classes are in my own classroom in the Santisuk English School building, on Lat Phrao Road in Khlong Chan, Bang Kapi, Bangkok. You can also study fully online or hybrid from anywhere. LINE and WeChat get the same quick reply.
Address
Santisuk English School
3071 Lat Phrao Rd, Khlong Chan, Bang Kapi, Bangkok 10240
LINE
Tap to copy the ID
Phone, direct
School reception (Santisuk English School): 02 734 3797. Ask for GrammarMetric classes.
Already studying here? Open your classroom to follow the lesson on your own device.
Meet me before you decide.
The demo class is free and it is a real lesson, not a sales meeting. You will leave knowing your level and where you would start.