Many parents and teachers seem to think that it is a good idea for teachers to give a lot of homework. The more homework the better. Some years ago, MOE realised the folly of this and tried to stem the homework tide, but to little avail.
More homework is not necessarily better. It can give a student brain fatigue and we all know what happens when a computer tries to run several programs cocurrently.
I once had a HOD who just came to our school from a previous school and she ended up co-teaching Social Studies with me. During the June holidays, she told me to give the students TEN Social Studies practice papers. I told her that was excessive, She said, just give.
I told the first express class that they would be getting TEN practice papers. There were howls of protests. I could sympathise. In the end I gave them just one. You see, SS was just an elective and the students naturally prioritized the core subjects first - English, Mathematics and Science. No way they would do ten social studies exam papers during the holidays.
The homework should be targeted (towards understanding the syllabus documents - which are all online now) and moderate. Excessive homework is like binge eating. Binge eating is not healthy. Binge anything is not healthy.