Could you correct me, please? Tell me whether I have used "must" and "have to" correctly.

Is discipline good?

I'm going to tell you about the new rules at 'A School'.

The rules that the students have to follow are a quite hard: First, they have to wait for their teachers to arrive to the class. Secondly, they must wear an uniform. In addition, they have to look good (the hair, shoes...). Third, the students mustn't use their mobile phone in class. Also, they can't go to a fast-food restaurants for lunch. Last but not least, if they don´t do their homework they will have to stay when the class finishes.

The school has had many changes. For instance, the building is more new. It has more money for sports activities and for improving the teaching. Moreover, the students are going to the best universities now.

As I see it, the school has got better, but maybe the rules are too severe since at “A” school there are little children as well.

Is 'A School' the name of the school?

To 'have a look' is to look at something. To 'have a good look' is to have a long/careful look at something. 'They have to have a good look' doesn't quite mean what you intend. You could say "They have to have a good appearance', but "They have to look good" sounds better. You could alternatively say "They have to maintain a good appearance".

Every time you say "the students" you can just say "students" if you wish.

"...teachers to go to the class" isn't gramatically wrong, but given the situation 'come' or 'arrive' are better.

You need to break up your sentences with full stops so the paragraph doesn't become one big sentence.

"more new" is perfectly fine. It would be better as "newer" in my opinion.

Why do you keep adding 's' to adjectives?

You used 'have to' and 'must' perfectly. Congratulations :-)

If you have any questions, feel free to ask :-)

Hello Reich. Yes, you used "must" and "have to" correctly. Good job!

Could you correct me, please? Tell me whether I have used "must" and "have to" correctly.

Is good the discipline?

I´m going to tell you about the news rules in “A” school.

The rules that the students have to follow are a quite hard: First, they have to wait to their teachers to go to the class, in the second place, they must wear an uniform, in addition, they have to have a good look ( the hair, shoes...), third, the students mustn´t use their mobile phone in class. Also, they can´t go to a fast-food restaurant for lunch, and last but not least, if they don´t do their homework, they have to stay when the class finish.

In the school have had many changes, for instance, the building is more new, it has more money for sports activities and for improving the teaching. Moreover, the students is going to the bests universities now.

As I see, the school has got better, but maybe the rules are too severes, since in “A” school there are little children as well.