Pilot testing and field evaluation are important steps after developing a curriculum to determine its strengths and weaknesses before final implementation. Monitoring and evaluation are also necessary during the implementation process to ensure the curriculum remains relevant and effective. There are two main approaches to curriculum evaluation - school-based evaluation led by school personnel, and accreditation which involves external review to assure standards are met. Key areas of evaluation under curriculum and instruction include the curriculum design, classroom management, instructional methods, graduation requirements, and student performance assessment.