What This Skill Does
This skill operationalises formative assessment by systematically examining student work to identify what is missing and why. Rather than generic feedback ("needs improvement"), it classifies gaps as conceptual (misunderstanding the underlying idea), procedural (understanding the concept but erring in execution), or communication (understanding but unable to express it adequately). Each classification determines a different teaching response.
Evidence Foundation
The approach is grounded in Sadler's (1989) framework requiring students and teachers to understand learning goals, assess current position relative to those goals, and take targeted action to close gaps. Hattie & Timperley (2007) emphasised that "effective feedback must address three questions: Where am I going? How am I going? Where to next?" Most teacher feedback addresses only the first two; gap analysis ensures the third—specific actionable next steps—receives equal attention.
Heritage (2010) demonstrated that "different gap types require different interventions."
Key Analytical Moves
- Identify strengths first. Specific, evidence-based strengths (not generic praise) establish foundation and maintain motivation.
- Classify each gap. Determine whether the student lacks conceptual understanding, makes procedural errors, or struggles with communication. This classification directs the remedy.
- Generate targeted next steps. Avoid "practise more"; instead specify exactly what to work on and how.
- Prioritise gaps. Address foundational gaps (usually conceptual) before dependent ones.
- Write actionable feedback. Structure as: acknowledge strength → identify the key gap → provide specific next step.
Input Requirements
- Student work description (what they produced)
- Assessment criteria (what to assess against)
- Learning objective (what they were meant to learn)
Output
Gap analysis with classified gaps, identified strengths, prioritised next teaching steps, and a feedback script communicating findings to promote improvement rather than discouragement.