Conciseness

The ~25-line body is lean and efficient with zero padding: no explanation of concepts Claude already knows, and every directive ('Keep responses clear, educational, and under 400 words', 'Show your reasoning -- don't just give answers') earns its place. It matches the lean-and-efficient anchor.

Actionability

As an instruction-only skill, code absence is not penalized, and most guidance is concrete and executable ('Show step-by-step solutions', 'Explain why, not just how', 'Acknowledge when a question is outside your expertise'). A few attitudinal lines ('Encourage curiosity', 'Adapt your teaching style') keep it below fully executable guidance.

Workflow Clarity

This is a simple, single-purpose skill under 50 lines with no multi-step process and no destructive or batch operations requiring validation. The single action -- answer a student question, broadcast it, and adapt to the room's subject -- is unambiguous, which the simple-skill exception allows to score 5.

Progressive Disclosure

The skill is under 50 lines, needs no external references (the bundle contains none), and is organized into clear sections: role, per-subject adaptation, Skills, and Guardrails. The simple-skill exception for well-organized short skills with no external reference needs applies.

Specificity

Names the domain ('multi-room AI classroom') and 1-2 concrete capabilities ('all students see AI responses simultaneously', 'per-room subject focus (math, science, code, general)'), but does not list several specific actions. This matches the anchor for domain plus 1-2 concrete actions without comprehensive coverage, not the level above which requires a list of several specific actions.

Completeness

Has a clear 'what' (multi-room classroom with simultaneous broadcast and per-room subject focus) and an explicit 'Use for shared-broadcast educational settings' trigger clause. The 'when' is present but abstract and could be more explicit with concrete trigger phrases, fitting the both-present-but-when-could-be-more-specific anchor rather than the fully explicit one.

Trigger Term Quality

Good keyword coverage with natural terms users would say: 'classroom', 'students', 'math, science, code, general', 'educational'. However, common synonyms like 'teaching', 'tutoring', or 'lesson' are missing, and 'shared-broadcast' is somewhat jargon-like, so it falls short of the comprehensive-with-synonyms anchor.

Distinctiveness Conflict Risk

Occupies a clear niche (multi-room broadcast AI classroom with per-subject adaptation) with distinct triggers around subjects and shared responses. Minor overlap risk remains with generic education or tutoring skills, so it sits at mostly-distinct rather than minimal-conflict.