A little clarity.
A reason to trust.

Published mechanics.
Original material.

TestAS Lab is an independent preparation platform for digital TestAS. Our Core practice uses original generative engines for Figure Sequences, Mathematical Equations and Latin Squares. The engines were adapted from our existing dMAT Lab code into a separate project; dMAT accounts and source packs are separate.

Every answer needs a reason.

Figure tasks are checked for distinct visible choices and a consistent six-frame replay. Equation systems are checked for a unique solution within the integer range. Latin Squares are checked against row and column constraints and the target’s deduction path.

Subject packs arrive as linked systems.

An editor imports a shared source and 4–8 linked questions with four distinct options each, a correct answer, an explanation and supporting evidence. A draft must be reviewed before publication. Structure checks do not replace subject-matter review. Advance enrolment may be available before a subject opens; checkout clearly identifies it. Core opens after payment verification and the 90-day period starts immediately, including while you wait for your subject practice to open. The enrolment page shows current bank availability; a published pack does not mean a complete official-length subject simulation is available.

Your attempts keep their original questions.

Each session stores its own question snapshot when it begins. Later source changes do not rewrite a saved attempt. Answer keys remain on the server during account practice and unlock according to learning or timed mode. Public trial samples intentionally include their solutions.

Updated 3 November 2026 · Course policy version testas-2026-10-30-bridge.