校長領導是學校變革與發展的關鍵，不僅攸關學校效能的高低，也會對學生的學習表現產生影響與作用。然臺灣有關校長領導評鑑的探討仍有所不足，尚有再開拓的空間，故本文以美國范德堡大學發展的教育領導評量模式（VAL-ED）為探討重點，分析VAL-ED模式的發展背景、概念架構、核心要素、關鍵歷程，以及實施程序，並進一步加以評析。最後，再從政策與實踐角度提出相關建議，作為臺灣中小學校長評鑑之參考。作為一種評鑑系統，VAL-ED模式在美國的實際應用獲得不錯的評價，建立了獨自的品牌與特色。臺灣在借鏡VAL-ED模式時，除了了解其特點及限制外，也要考慮在地文化與教育情境的差異，進行轉化與重構，使之更為適切可行，並發揮其效果。據此，本文提出下列若干建議：一、連結校長領導與學生學習；二、平衡專業發展與績效管理；三、建構校長專業標準；四、運用360度回饋系統；五、發展校長領導評鑑支持系統。

The success of education reform depends on whether principals can effectively lead the school. Principal leadership is an important element of effective schools. It is time to rethink principal leadership assessment and put principals at the center of that discussion in an effort to build individual leadership capacity and school effectiveness. The Vanderbilt Assessment of Leadership in Education (VAL-ED) was developed by a team of researchers from Vanderbilt University. This model can be used by K-12 schools to assess principals’ leadership performance. The purposes of this article are to explore the development of the VAL-ED model and discuss its policy implications for principal leadership assessment in Taiwan. The VAL-ED model is an evidenced-based system that assesses principals’ leadership behaviors known to influence student learning. The conceptual framework of the VAL-ED model consists of six core components by six key processes. The core components are features of effective schools. The key processes are leadership behavior that principals can apply to lead their schools. It measures principals’ leadership behaviors for the purposes of diagnostic analyses, improvement feedback, progress monitoring, professional development, and performance evaluation. It is a useful model for assessing principals’ learning-centered leadership. This article proposes the following suggestions: (1) connecting principal leadership to student achievement; (2) balancing professional development and performance management; (3) constructing the professional standards for principals; (4) adopting 360-degree feedback assessment methods; and (5) developing the support system for principal leadership evaluation.