Many factors to consider:
- You could be potentially doing subjects that are too easy (?) for you --> You aren't being challenged as other people are
- You could be intelligent to begin with. A little work equates to someone else's many hours spent on studying
- Depends on your cohort. If everyone is competitive as hell, guaranteed workload will feel like a lot because you need to study enough to "beat" other students. Then you wonder, how much is enough? Everyone (in my school at least) wanted to be at the top, so majority of the work came from extra studying (not just homework)
- Depends on your school. Teachers won't give home work out, but might be implied that you do independent readings. E.g. for english, only real homework was the hand in a practise essay. But if you wanted to do well, you should probably do extra reading to get a better grasp of the modules, etc
- You are potentially not studying enough, if that's possible :S
- You're capable of taking on more than others. To you, it's a breeze
- You're the type that chills majority of the year and then crams right before exams lol