K-12 schools refer to the educational system that includes kindergarten through 12th grade. This system is designed to provide a comprehensive education for children and teenagers, typically from ages 5 to 18. K-12 education is divided into three main levels: elementary, middle, and high school, each focusing on different developmental stages and learning objectives. In many countries, including the United States, K-12 education is mandatory, ensuring that all children have access to basic education. Schools may be public, private, or charter, and they often follow state or national curriculum standards. The goal of K-12 schools is to prepare students for higher education, vocational training, or the workforce.