Can you check these sentences for me, please? I really need to know if they are possible because I need to meet some American teachers tomorrow.

1)How do you call the teacher who is at the head of the English Department in a high school?
2) She has organised a variety of cultural and free-time activities for a group of American pupils aged between 14 and 17 who will be visiting our school next week.
3) We are all pleased to welcome them to our school, which was founded nearly 30 years ago and is well known (?) for its excellent preparation (?) in scientific studies.
4) None of my students is involved in the students' exchange. However, I'll do my best so that (?) everything goes well (?).
5) Can you say "If I was she (or her?)
What would you say to a foreigner , who has just arrived at your school?
6) "Pleased to me you. I hope you'll have a nice time here in Italy. We'll certainly see each other during this and the next week.
7) I will be honoured to invite you to have lunch (?) with my family. Would it be all right with you, if you had lunch with us next Monday?
8) I can't be with you all day since I have to pick up my child from school at 4 pm every day.

1) What do you call the teacher who is the head of the English Department in a high school? [English Department Chair]

2) She has organized a variety of cultural and free-time activities for a group of American students between ages 14 and 17 who will be visiting our school next week.

3) We are all pleased to welcome them to our school, which was founded nearly 30 years ago and is well known for its excellent preparation in scientific studies.

4) None of my students is involved in the students' exchange. However, I'll do my best so that everything goes well.

5) Can you say "If I was she (or her?)
What would you say to a foreigner , who has just arrived at your school?
[I'm not sure what you need here. I'd say, "If I were you, I'd.... " or "If I were that teacher, ... "]

6) Pleased to meet you. I hope you'll have a nice time here in Italy. We'll certainly see each other a lot this week and next.

7) I will be honoured to invite you to have lunch with my family. Would it be all right to have lunch with us next Monday?

8) I can't be with you all day since I have to pick up my child from school at 4 pm every day.

Sure! I can check these sentences for you. Here are my suggestions:

1) How do you call the teacher who is in charge of the English Department in a high school?
2) She has organized a variety of cultural and leisure activities for a group of American students aged between 14 and 17 who will be visiting our school next week.
3) We are all pleased to welcome them to our school, which was founded nearly 30 years ago and is well known for its excellent preparation in scientific studies.
4) None of my students are involved in the student exchange. However, I'll do my best to ensure that everything goes well.
5) Can you say "If I were her?"
What would you say to a foreigner who has just arrived at your school?
6) "Nice to meet you. I hope you'll have a great time here in Italy. We'll definitely see each other during this and the next week.
7) I would be honored to invite you to have lunch with my family. Would it be alright with you if we had lunch together next Monday?
8) I can't be with you all day since I have to pick up my child from school at 4 pm every day.

Remember, when addressing a specific subject like a teacher in charge of a department, it's better to use phrases like "in charge" or "in the head of" instead of "at the head of." Additionally, when talking about a group of students, use the word "students" instead of "pupils." Finally, when using conditional statements like "If I were her," it is grammatically correct to use "were" instead of "was."