The Learning Hub tracks your performance on each skill individually and adjusts question difficulty to keep you in the right challenge zone.
Four difficulty levels
- Foundational
- Moderate
- Difficult
- Very Difficult
You start at Foundational unless you already have performance data for that skill.
Moving up in difficulty
The system looks at your accuracy across your last 4 attempts on a skill:
- Selective/OC preparation: advance when recent accuracy is ≥ 75%
- FlexiClass: advance when recent accuracy is ≥ 90% (more gradual progression)
Moving down in difficulty
If recent accuracy drops below 40%, the system moves you to a lower level so you can rebuild the foundational understanding before progressing again.
Mastery
Each skill has a mastery score from 0.0 to 1.0, calculated as:
- 40% weight on overall accuracy (all attempts ever)
- 60% weight on recent accuracy (last 4 attempts)
Reaching mastery earns a Mastery badge and XP. Skills with high mastery are shown in your Performance dashboard.
Your skillset
Your account has a skillset setting — either OC/Selective or FlexiClass — which determines which skills are available and the advancement threshold used. If you think yours is set incorrectly, contact support.