How the mastery indicator works

Four levels

Every practice you have attempted carries a mastery badge showing how strong your grip on it currently is:

• Needs Work, below 50%
• Developing, 50% to 69%
• Proficient, 70% to 84%
• Mastered, 85% and above

You will see the badge on practice cards on the Study page, on the Practice complete screen after a session (along with how much it moved), and in the Mastery card on the Progress page. The Mastery button on the Study page opens a How Mastery Works summary.

The four factors behind the number

It is not simply your last session's accuracy. Four things feed into it:

• Recent accuracy. Latest attempts weigh more than older ones.
• Practice frequency. More attempts build confidence in the number.
• Consistency. Stable scores rank higher than erratic ones.
• Time decay. Skills fade when they are not practised.

Why it can drop without you doing anything

Because of that fourth factor. If a practice goes untouched for a while, its percentage declines on its own. This is deliberate and not a penalty: language skills genuinely fade without repetition, so the number tries to be honest about where you are today rather than where you were three months ago.

How it connects to the pretest and posttest

Each part runs in order: pretest, practices, then posttest.

• The pretest is always open.
• The practices in a part open once that part's pretest is done.
• The posttest opens once the pretest is done and every practice in the part has reached Mastered.

So the mastery badge is not decoration: it decides when you are ready to move on to the next assessment. Because the number can decay, a practice that was Mastered can slip back down, and the posttest locks again until you bring that practice back up. Click a locked card to see which condition is still missing.