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Context: Parents tell their children before leaving for their work.

These things to do after returning from school are doing homework, playing games outside for a while, having snacks, and reading books.

Please check them.

Is "These things to do" suitable?

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Before leaving for work, parents tell their children what they have to do after they come home from school.

These are what you need to do after returning from school: do your homework, play games outside for a while, have some snacks, and read books.

Comments  
kumenglishplaying games outside for a while,

You don't need the second word. In that context, native speakers don't normally include it.