A complete instructional leadership system for improving classroom practice! Based on the Vermont Classroom Observation Tool diagnostic classroom observation (DCO) provides principals with guidance for the entire instructional supervision process from preconference analysis to postconference follow-up. The model includes protocols for observing math/science and literacy instruction criteria for recognizing exceptional teaching and standards for determining classroom quality and student engagement. Readers will also find: Classroom observation forms to help identify instructor strengths and weaknesses Scoring forms to assist with the final evaluation and review process Real-world vignettes that illustrate key indicators of quality teaching Guidance for introducing DCO into any school setting