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Sources & methodology
Our practice is written to match the real Digital SAT. We follow the official College Board framework for what the test covers and how it's scored, write our own questions and explanations against it, and mirror the adaptive two-module format. Here's exactly what we align to — and a clear note on our independence.
Last reviewed 2026-06-20.
These are the official, public sources that define the Digital SAT. We reference them so our practice reflects the real test — not a dated version of it.
The official maker of the SAT. Our content structure follows the current Digital SAT, which the College Board defines. Koydo is independent and not affiliated with the College Board.
The official specification of what the Digital SAT tests — the Reading and Writing and Math content domains and question types our practice mirrors.
The official digital testing app and full-length practice tests. We design our timed modules to match the real adaptive, two-stage digital format.
The official 400–1600 score scale and how section scores combine. The numbers behind our readiness estimates trace here.
The official annual report of SAT score percentiles. The approximate percentile benchmarks on our score guide come from here — always check it for the exact current figures.
The College Board's official free-practice partner. We reference its openly available materials when shaping explanations and difficulty.
How the content is made
Our editorial team — Koydo Lyceum — writes original practice questions and explanations mapped to the official Reading and Writing and Math domains, then reviews them for accuracy and difficulty. We mirror the real adaptive, two-module flow so practice feels like the actual test.
Koydo is an independent study aid and is not affiliated with, endorsed by, or sponsored by the College Board. “SAT” and related marks belong to their owners and are used only to describe what we help you prepare for. For official rules, dates, scoring, and policies, always check the College Board sources linked above.
No. Koydo is an independent study aid and is not affiliated with, endorsed by, or sponsored by the College Board, which makes and administers the SAT. We align our content to the official Digital SAT framework, but we are a separate company.
Our editorial team writes original practice questions and explanations, structured to match the official Digital SAT framework — the Reading and Writing and Math domains, question types, and adaptive two-module format. Every source we align to is listed on this page.
We design our timed modules to mirror the real adaptive, two-stage digital test you take in the College Board's Bluebook app, so the rhythm of test day is something you've already practiced. Always confirm current format and rules on the official College Board sources.
Our readiness estimate uses the official 400–1600 score scale as a reference, based on your practice performance. It's an estimate to guide your studying, not a prediction or guarantee of your official score.
It was last reviewed on 2026-06-20. We update it whenever the test, our sources, or our methodology change.