Getting started
English teachers who set and mark real written work, and the language programs they teach in. It is built around ESL and EFL teaching in Japan, but nothing in it is Japan-only.
No. Teachers and institutions pay. Students join a class with a code and use the platform free.
One class of up to 30 students, 15 welcome credits, unlimited free objective grading, and 30 days of history.
No. The free plan needs no payment details at all.
Credits and grading
A credit is the unit for generation and written assessment. One credit per section generated, one per submission graded, two per writing assessment.
Objective grading, meaning multiple choice, true/false, cloze, reorder and word match, is free forever on every plan. So is class management, CEFR analysis of your own text, and analytics.
You can buy top-ups at $0.10 to $0.12 per credit. In the meantime, objective grading and every non-generation feature keeps working exactly as before.
Yes. Once a test or writing assignment is graded, TeachLex can generate practice targeted at the questions your class actually missed and the vocabulary that sat above level. Every exercise is CEFR-profiled before it reaches a student, and you decide whether it goes to one student or the whole class.
Objective questions, yes, instantly. Written work gets a suggested score and suggested feedback with a confidence level attached. You review it, change anything you want, and release it. Nothing reaches a student before that.
Trust and data
No, and it is designed never to. It shows how a piece of writing was produced compared with that same student’s own history. You read that and you decide what it means. The platform does not render verdicts.
Vocabulary range, syntax, and writing habits, tracked across everything they have submitted and always measured against their own earlier work rather than against classmates. It is a development view, not a ranking.
Typing rhythm, pauses, and revision behavior, never which keys were pressed or what they spelled. It cannot see other tabs, other devices, your student’s screen, camera, or location.
Never. Student writing is processed to produce your results and then stays in your account.
In Japan, in the ap-northeast-1 region. Our privacy policy and terms set out the details in full.
Levels follow the standard CEFR scale, A1 to C2. Vocabulary is banded using the CEFR-J Wordlist, part of the CEFR-J, an adaptation of the CEFR built from East Asian learner data. Its can-do descriptors correlate with CEFR levels at 0.93 on average across the four skills, as reported by the CEFR-J developers. Coverage above B2 comes from the Octanove Vocabulary Profile. Sources and licenses are listed on the attribution page.
For teachers in Japan
Yes. Paid plans allow 40 students per class, which is the legal maximum class size in Japan, so a real class always fits.
Bilingual English and Japanese reports are included on the Power plan and on institutional licenses.
Yes. Institutions get the standard quote flow, 見積書 to purchase order to 請求書, and our tokushoho page carries the required disclosures.
Plans and billing
Yes. You keep access until the end of the period you have paid for.
Your history window changes to the new tier’s window at renewal. Export what you need first, and Plus and Power both allow export before any change takes effect.