Which appraisal design provides the strongest basis for a dependable judgement about a teacher’s classroom performance?

Correct answer: Use several evidence sources across multiple occasions. Several sources of evidence across multiple occasions give the most dependable picture of classroom performance.

• Use two observations by one appraiser within one week. Two observations by one appraiser in a single week give a narrow sample and one viewpoint.
• Use one observation supplemented by a self-report. One observation plus a self-report is too limited a basis for a dependable judgement.
• Use examination results and attendance as the main evidence. Examination results and attendance are affected by many factors and do not show classroom practice directly.