Students in Finland and South Korea spent fewer than three hours - the least among the 65 countries and regions surveyed - on homework each week.
The global average was about five hours' worth of homework each week.
It is difficult to set a "right" amount of homework for everyone, said Prof Tan.
In high school, you may have finished homework in the hall right before class on more than one occasion and still earned a good grade; that just isn't possible in college.
Therefore, a full-time student taking four courses will devote, on average, between three to five hours per day working on coursework in addition to class time.
Although these figures may seem high compared to high school, they are not outlandish considering what you will have to do during that time.She added that teachers and students list homework assignments on their classroom boards, so students do not get assigned too much work at any one time.Associate Professor Jason Tan, an education policy expert at the National Institute of Education, said: "The 9.4 hours do not seem that overwhelming, when students are taking six to nine subjects in Secondary 3.The same correlation is also seen when comparing homework time and test performance at schools within countries.Past studies have also demonstrated this basic trend.The Teaching and Learning Center of the University of Oregon recommends that you spend at least two to three hours per course hour reading, studying or doing homework.Likewise, the University of Michigan-Flint recommends between six to nine hours of study time per week per three-credit hour course."But (the report) also doesn't give any indication of the subjects the time is spent on, or the nature of homework, so it's hard to draw any conclusions from this." Prof Tan added that although students in South Korea and Japan were ranked low in the number of homework hours in this survey, they were not "learning any less"."Their students spend long hours after school in cram schools similar to tuition centres, called juku in Japan and hagwon in Korea," he said.Piling on the homework doesn't help kids do better in school. That's the conclusion of a group of Australian researchers, who have taken the aggregate results of several recent studies investigating the relationship between time spent on homework and students' academic performance.According to Richard Walker, an educational psychologist at Sydney University, data shows that in countries where more time is spent on homework, students score lower on a standardized test called the Program for International Student Assessment, or PISA.