1. Teachers are required to teach a lesson in a limited period of time (for example, it is 45 minutes in Vietnam).
2. It is because at such a young age, they may be unaware of potential damgers of using these tools (and they often consider experiment tools their toys), so it is highly likely that primary school students will harm themselves even under close supervision of teachers.
Are parentheses used correctly?
1- "damgers" is not a word. I suppose you meant "damages" which is a word, but that has a special meaning (look it up); it is not simply a plural of "damage". Otherwise, I'm guessing that you meant "dangers".
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1- "damgers" is not a word. I suppose you meant "damages" which is a word, but that has a special meaning (look it up); it is not simply a plural of "damage". Otherwise, I'm guessing that you meant "dangers". In either case, use "the" because you are talking about a particular "damage" or "dangers".
Nh?t Bìnhconsider experiment tools their toys
That p