The school day is often a point of debate, with some arguing that longer days lead to better academic outcomes while others insist that overlong days can cause fatigue and burnout in students. For parents and educators alike, understanding how school days compare internationally can provide useful perspective.

If you’re short on time, here’s a quick answer to your question: Thailand has the longest average school day in the world at 9 hours and 30 minutes per day.

In this comprehensive guide, we’ll explore school day lengths around the world and look at how factors like curriculum, cultural values, and government policies impact the time students spend in school.

Defining and Comparing School Days Globally

When it comes to the length of a school day, different countries around the world have varying approaches. Factors such as academic focus, cultural norms, and regional differences all play a role in shaping the school day.

In this article, we will explore the length of school days, the allocation of academic and non-academic time, and the impact of regional and cultural differences.


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School day length

The length of a school day can vary significantly from country to country. Some countries have shorter school days, typically lasting around 4-5 hours, while others have longer days that can extend up to 8-9 hours.

For example, in Thailand, students have one of the longest school days in the world, with an average of 9 hours of formal instruction and additional time for extracurricular activities. On the other hand, countries like Finland and Sweden have shorter school days, but they focus on maximizing the quality of instruction during that time.

Academic time vs. non-academic time

Another important aspect to consider when comparing school days globally is the allocation of academic and non-academic time. Some countries prioritize academic subjects and dedicate a significant portion of the school day to subjects like math, science, and language arts.

In contrast, other countries emphasize a more holistic approach to education, incorporating non-academic activities such as physical education, arts, and music. For instance, in the United States, school days typically include a mix of academic subjects and non-academic activities to provide a well-rounded education.

Regional and cultural differences

Regional and cultural differences also influence the structure and length of school days. In some countries, the school day is divided into multiple sessions, with breaks in between for rest and meals.

This is common in countries like India, where students have morning and afternoon sessions with a long break in between. Additionally, cultural norms and traditions may impact the timing of the school day.

For example, in some Middle Eastern countries, the school week starts on Sunday instead of Monday due to religious practices.

It’s important to note that while the length and structure of the school day can vary, the focus should be on providing a well-rounded education that meets the needs of students. Each country’s approach to education is shaped by its unique context and priorities.

Countries with the Longest School Days


Thailand has the longest school day in the world, with students spending an average of 9 hours and 30 minutes in the classroom. This is significantly longer than the school day in most other countries.

There are a number of reasons why Thailand has such a long school day. One reason is that the Thai government places a high value on education. Education is seen as the key to economic development and social progress.

Another reason for the long school day is that the Thai academic curriculum is very rigorous. Students are expected to master a wide range of subjects, including Thai, mathematics, science, English, and social studies. In addition, Thai students are also expected to participate in a variety of extracurricular activities, such as sports, music, and art.


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South Korea

South Korea is known for its rigorous education system and has one of the longest school days in the world. Students in South Korea typically spend around 8 hours and 40 minutes in school each day, with additional hours spent on homework and extracurricular activities.

The long school day is believed to contribute to the country’s high academic performance and competitiveness.


Singapore is another country that places a strong emphasis on education. Students in Singapore have one of the longest school days globally, with an average of 7 to 9 hours spent in school each day. The education system in Singapore is highly regarded for its focus on critical thinking and problem-solving skills.


China’s education system is known for its intense workload and long school days. Students in China often have school days that last between 8 to 10 hours, with additional time spent on homework and tutoring.

The country’s emphasis on education has led to impressive academic achievements, particularly in the fields of science and mathematics.


Japan is renowned for its dedication to education and has a relatively long school day. Students in Japan typically spend around 6 to 8 hours in school each day, and they are also expected to participate in extracurricular activities and study at home.

The Japanese education system is known for its strong emphasis on discipline and respect.

United Kingdom

The United Kingdom may not have the longest school day compared to other countries, but it still deserves a mention. Students in the UK usually spend around 6 to 7 hours in school each day, with additional time for homework and studying.

The education system in the UK focuses on a well-rounded curriculum that includes academic subjects, sports, and creative arts.

It’s important to note that the length of a school day can vary within each country, depending on the grade level and individual schools. Additionally, the effectiveness of longer school days in improving educational outcomes is still a topic of debate among educators and researchers.

Impacts of Long School Days

Academic achievement

Long school days can have a significant impact on academic achievement. With more time spent in the classroom, students have the opportunity to delve deeper into subjects, engage in hands-on learning experiences, and receive additional guidance from teachers.

Research has shown that countries with longer school days often have higher scores on international assessments such as the Programme for International Student Assessment (PISA).

Evidence shows that students who attend schools with longer school days tend to perform better academically compared to those with shorter school days.

The additional instructional time allows for more practice and reinforcement of concepts, resulting in improved learning outcomes.

Student health and wellbeing

While longer school days may have some benefits for academic achievement, it is important to consider the impact on student health and wellbeing. Extended hours in the classroom can lead to increased stress and fatigue among students.

Lack of physical activity and limited free time can also have negative effects on their overall wellbeing.

It is crucial for schools with longer school days to prioritize breaks, physical education, and mental health support. Encouraging students to engage in physical activities, providing nutritious meals, and implementing strategies to reduce stress can help mitigate the potential negative effects of longer school days on student health.

Teacher workload

Longer school days not only affect students but also place additional demands on teachers. Extended hours in the classroom can lead to increased workload and burnout among educators. Teachers may have less time for lesson planning, grading, and professional development.

Efforts should be made to support teachers in schools with longer school days. Providing adequate resources, reducing administrative tasks, and offering opportunities for collaboration and professional growth can help alleviate some of the challenges associated with longer school days.

Arguments For and Against Extended School Days

Pros of longer days

Extended school days have been a topic of debate in many countries around the world. Advocates for longer school days argue that it can have several benefits for students. One of the main advantages is that it provides more time for teaching and learning.

With longer school days, teachers have the opportunity to cover more material and delve deeper into the subjects. This can lead to a more comprehensive education and better academic outcomes for students.

Another benefit of extended school days is that it allows for more time for extracurricular activities and enrichment programs. Students can participate in sports, arts, music, and other activities that contribute to their overall development.

These activities help students discover their passions, develop new skills, and build self-confidence.

Additionally, longer school days can provide a structured and safe environment for students. It keeps them engaged and away from potential negative influences. It also reduces the amount of unsupervised time that students may have after school, which can lead to risky behaviors.

Cons of longer days

Despite the potential benefits, there are also arguments against extended school days. One of the main concerns is the impact on students’ well-being. Longer school days can lead to increased stress and fatigue, as students have less time for relaxation, hobbies, and family activities.

This can have negative effects on their mental and physical health.

Furthermore, longer school days may also place a burden on families. Parents may struggle to adjust their schedules to accommodate the longer school hours. This can lead to difficulties in coordinating transportation, childcare, and family time.

Another argument against extended school days is the potential decrease in student motivation and engagement. When students are in school for longer periods, they may become less attentive and less motivated to learn.

This can result in decreased academic performance and a negative attitude towards education.

It is important to consider these arguments when discussing the implementation of extended school days. Each country should assess its unique educational system, cultural values, and the needs of its students to make an informed decision.

Takeaways for Parents, Educators and Policymakers

When it comes to the length of the school day, different countries have different approaches. Some countries prioritize longer school days, while others focus on shorter but more efficient days. Here are some key takeaways for parents, educators, and policymakers:

1. Consider the impact on students’ well-being

While longer school days may seem beneficial for academic achievement, it is important to consider the overall well-being of students. Extended hours can lead to increased stress and burnout, affecting students’ mental health and overall happiness.

Parents, educators, and policymakers should prioritize finding a balance between academic rigor and students’ well-being.

2. Quality over quantity

Instead of solely focusing on the length of the school day, it is crucial to prioritize the quality of education provided. A shorter but more focused and engaging day can be more effective in promoting learning outcomes.

Educators and policymakers should aim to create an environment that encourages active learning, critical thinking, and collaboration.

3. Explore alternative learning opportunities

Longer school days are not the only way to enhance students’ learning experiences. Parents, educators, and policymakers should explore alternative learning opportunities outside of the traditional classroom setting.

This could include extracurricular activities, community involvement, or online learning platforms. These options can supplement formal education and provide a well-rounded education for students.

4. Learn from successful education systems

It can be beneficial to study and learn from countries that have successful education systems. For example, Finland, known for its high-quality education, has comparatively shorter school days but focuses on personalized learning and teacher autonomy.

By understanding the strategies and approaches of these countries, educators and policymakers can implement effective changes in their own systems.

5. Tailor approaches to local contexts

While it can be informative to look at international examples, it is important to remember that each country has its own unique context. What works in one country may not necessarily work in another. Therefore, parents, educators, and policymakers should tailor their approaches to suit the specific needs and challenges of their own education system.

6. Continual evaluation and adaptation

Lastly, it is essential to regularly evaluate the effectiveness of any changes made to the school day length. This evaluation should include input from students, parents, educators, and policymakers. By continually adapting and improving, education systems can evolve to meet the needs of students in the ever-changing world.


While the optimal school day length continues to be debated, understanding the factors that drive school schedules around the world provides helpful perspective. South Korea tops the international rankings with over 9 hours of required school time per day.

But lengthy days alone do not determine academic success or student wellbeing. Parents, educators and policymakers must weigh benefits like increased instructional time against potential drawbacks like student fatigue.

By evaluating their specific needs and values, communities can make informed decisions about school day schedules.

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