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Sources & methodology
Our practice is written to match the real TOEFL iBT. We follow the official ETS format for all four sections and the 0–120 score scale, write our own tasks and feedback against them, and mirror the integrated and independent task types. Here’s exactly what we align to — and a clear note on our independence.
Last reviewed 2026-06-21.
These are the official ETS sources that define the TOEFL test. We reference them so our practice reflects the real exam.
The official home of the TOEFL test, run by ETS. Our content structure follows the official TOEFL iBT format. Koydo is independent and not affiliated with ETS.
The official specification of the four sections — Reading, Listening, Speaking, and Writing — and the question types our practice mirrors.
The official 0–120 score scale (each section 0–30) and how scores combine. The numbers behind our readiness estimates trace here.
Official free practice materials and test previews from ETS, which we reference when shaping explanations and difficulty.
How the content is made
Our editorial team — Koydo Lyceum — writes original practice tasks and feedback mapped to the official Reading, Listening, Speaking, and Writing formats, then reviews them for accuracy. We mirror the real integrated and independent task types so practice feels like the actual test.
Koydo is an independent study aid and is not affiliated with, endorsed by, or sponsored by ETS. “TOEFL” and related marks belong to their owners and are used only to describe what we help you prepare for. For official rules, dates, fees, and scoring, always check the ETS sources linked above.
No. Koydo is an independent study aid and is not affiliated with, endorsed by, or sponsored by ETS, which owns and administers the TOEFL test. We align our content to the official TOEFL iBT format, but we are a separate company.
Our editorial team writes original practice tasks and feedback, structured to match the official TOEFL iBT format — the Reading, Listening, Speaking, and Writing sections and their integrated and independent tasks. Every source we align to is listed on this page.
We design our timed sections and tasks to mirror the official TOEFL iBT. Always confirm the current format, rules, dates, and fees on the official ETS sources before your test.
Our estimate uses the official 0–120 score scale (each section 0–30) as a reference, based on your practice. It's guidance to direct your studying, not a prediction or guarantee of your official score.
It was last reviewed on 2026-06-21. We update it whenever the test, our sources, or our methodology change.