section_path: Types/Levels
section_name: Levels
paragraph_text: Levels
  
  Types of education are often categorized into different levels or stages. One influential framework is the International Standard Classification of Education, maintained by the United Nations Educational, Scientific and Cultural Organization (UNESCO). This classification encompasses both formal and non-formal education and distinguishes levels based on factors such as the student's age, the duration of learning, and the complexity of the content covered. Additional criteria include entry requirements, teacher qualifications, and the intended outcome of successful completion. The levels are grouped into early childhood education (level 0), primary education (level 1), secondary education (levels 2–3), post-secondary non-tertiary education (level 4), and tertiary education (levels 5–8).
  
  Early childhood education, also referred to as preschool education or nursery education, encompasses the period from birth until the commencement of primary school. It is designed to facilitate holistic child development, addressing physical, mental, and social aspects. Early childhood education is pivotal in fostering socialization and personality development, while also imparting fundamental skills in communication, learning, and problem-solving. Its overarching goal is to prepare children for the transition to primary education. While preschool education is typically optional, in certain countries such as Brazil, it is mandatory starting from the age of four.
  
  Primary (or elementary) education usually begins between the ages of five and seven and spans four to seven years. It has no additional entry requirements and aims to impart fundamental skills in reading, writing, and mathematics. Additionally, it provides essential knowledge in subjects such as history, geography, the sciences, music, and art. Another objective is to facilitate personal development. Presently, primary education is compulsory in nearly all nations, with over 90% of primary-school-age children worldwide attending such schools.
  
  Secondary education succeeds primary education and typically spans the ages of 12 to 18 years. It is normally divided into lower secondary education (such as middle school or junior high school) and upper secondary education (like high school, senior high school, or college, depending on the country). Lower secondary education usually requires the completion of primary school as its entry prerequisite. It aims to expand and deepen learning outcomes, with a greater focus on subject-specific curricula, and teachers often specialize in one or a few specific subjects. One of its goals is to acquaint students with fundamental theoretical concepts across various subjects, laying a strong foundation for lifelong learning. In certain instances, it may also incorporate rudimentary forms of vocational training. Lower secondary education is compulsory in numerous countries across Central and East Asia, Europe, and the Americas. In some nations, it represents the final phase of compulsory education. However, mandatory lower secondary education is less common in Arab states, sub-Saharan Africa, and South and West Asia.
  
  Upper secondary education typically commences around the age of 15, aiming to equip students with the necessary skills and knowledge for employment or tertiary education. Completion of lower secondary education is normally a prerequisite. The curriculum encompasses a broader range of subjects, often affording students the opportunity to select from various options. Attainment of a formal qualification, such as a high school diploma, is frequently linked to successful completion of upper secondary education. Education beyond the secondary level may fall under the category of post-secondary non-tertiary education, which is akin to secondary education in complexity but places greater emphasis on vocational training to ready students for the workforce.
  
  In some countries, tertiary education is synonymous with higher education, while in others, tertiary education encompasses a broader spectrum. Tertiary education builds upon the foundation laid in secondary education but delves deeper into specific fields or subjects. Its culmination results in an academic degree. Tertiary education comprises four levels: short-cycle tertiary, bachelor's, master's, and doctoral education. These levels often form a hierarchical structure, with the attainment of earlier levels serving as a prerequisite for higher ones. Short-cycle tertiary education concentrates on practical aspects, providing advanced vocational and professional training tailored to specialized professions. Bachelor's level education, also known as undergraduate education, is typically longer than short-cycle tertiary education. It is commonly offered by universities and culminates in an intermediary academic credential known as a bachelor's degree. Master's level education is more specialized than undergraduate education and often involves independent research, normally in the form of a master's thesis. Doctoral level education leads to an advanced research qualification, usually a doctor's degree, such as a Doctor of Philosophy (PhD). It usually involves the submission of a substantial academic work, such as a dissertation. More advanced levels include post-doctoral studies and habilitation.
  
  Successful completion of formal education typically leads to certification, a prerequisite for advancing to higher levels of education and entering certain professions. Undetected cheating during exams, such as utilizing a cheat sheet, poses a threat to this system by potentially certifying unqualified students.
  
  In most countries, primary and secondary education is provided free of charge. However, there are significant global disparities in the cost of tertiary education. Some countries, such as Sweden, Finland, Poland, and Mexico, offer tertiary education for free or at a low cost. Conversely, in nations like the United States and Singapore, tertiary education often comes with high tuition fees, leading students to rely on substantial loans to finance their studies. High education costs can pose a significant barrier for students in developing countries, as their families may struggle to cover school fees, purchase uniforms, and buy textbooks.