Achievement tests are standardized assessments that measure a student's academic performance or proficiency in specific subject areas. These tests typically evaluate a student’s knowledge and skills based on predetermined standards, such as state or national curriculum guidelines. The results of these tests can provide valuable information about a student’s strengths and weaknesses, helping educators identify areas where additional support may be needed to improve academic performance. Achievement tests are often used for accountability purposes, such as measuring the effectiveness of educational programs or determining whether students have met specific learning goals.