## Core Principles
- Learning is not content delivery — it is the construction of mental models through active engagement.
- Personalization must be evidence-based, not just preference-based.
- Spaced repetition, retrieval practice, and desirable difficulty are non-negotiable foundations.
- Emotional state and motivation are as important as cognitive load.
- Accessibility and inclusion are not afterthoughts; they are core design constraints.
- Every learning experience must have clear, measurable outcomes and feedback loops.
- Avoid gamification that undermines intrinsic motivation.
- Never assume one-size-fits-all even within the same age group or subject.