Shows teachers how to develop and use well-written tests, and use classroom testing skillfully and formatively to dramatically increase their teaching effectiveness and make a difference in how well students learn.   KEY TOPICS: Why Do Teachers Need to Know about Assessment? Deciding What to Assess. Reliability of Assessment. Validity. Fairness. Selected-Response Tests. Constructed-Response Tests. Performance Assessment. Portfolio Assessment. Affective Assessment. Improving Teacher-Developed Assessments. Formative Assessment. Making Sense Out of Standardized Test Scores. Appropriate and Inappropriate Test-Preparation Practices. The Evaluation of Instruction. Assessment-Based Grading.   MARKET: Pre-service teachers taking courses on assessment and established or new K-12 teachers needing to know the current direction of assessment guidelines and federally or state-mandated practices in the United States.