Can someone check these sentences I need to prepare for tomorrow?

Thank you.

1) Troy has been at the BRIT School since he was 14. Before that he was in a normal secondary school.
2) Unlike in a normal secondary school, students at the BRIT study all the ordinary academic subjects, but they can specialize in the arts. Troy’s thing is theatre.
3) It’s hard to get a place at the BRIT school because it is free and a lot of people want to get in.
4) Some very talented students have studied here and there are quite a lot of famous ex-students. However, it is not a fame school. There are 800 students and they can’t all be stars.
5) First of all, they need to be sensible and keep their feet on the ground.
6) Troy has been trying to learn as much as possible while he is here, rather than dreaming about his future.
7) Most students are quite realistic and there aren’t too many people with big egos. They don’t think about fame and success all the time.
8) The most important thing the school has been teaching them since they started is to be creative and independent.
9) Stacey has learnt a lot of practical skills since she’s been here (??)

1) The sentence is grammatically correct and makes sense. It states that Troy has been attending the BRIT School since he was 14 years old, and before that, he was in a normal secondary school.

2) The sentence is grammatically correct and makes sense. It highlights the difference between the BRIT School and a normal secondary school. While students at the BRIT School study all the ordinary academic subjects, they also have the option to specialize in the arts. In Troy's case, his focus is on theatre.

3) The sentence is grammatically correct and makes sense. It explains that getting a place at the BRIT School can be challenging because it is both free of cost and highly desirable. Many people want to attend the school, which makes the admission process competitive.

4) The sentence is grammatically correct and makes sense. It points out that the BRIT School has had numerous talented students and alumni who have achieved fame. However, the school is not primarily focused on producing celebrities. With 800 students, not everyone can become a star.

5) The sentence is grammatically correct and makes sense. It suggests that one of the qualities the students need to possess is being sensible and grounded. Keeping their feet on the ground means staying realistic and not becoming too caught up in dreams or fantasies.

6) The sentence is grammatically correct and makes sense. It states that Troy has been actively trying to learn as much as possible during his time at the BRIT School, rather than daydreaming about his future. This highlights his dedication and focus on the present.

7) The sentence is grammatically correct and makes sense. It explains that most students at the BRIT School are realistic and don't have overly inflated egos. They don't constantly think about fame and success but rather focus on their education and personal growth.

8) The sentence is grammatically correct and makes sense. It emphasizes that one of the most important things taught at the BRIT School is to be creative and independent. The school fosters a sense of autonomy and encourages students to think outside the box.

9) The sentence is grammatically correct, but there seems to be an error in verb tense. "Stacey has learnt" should be changed to "Stacey has learned" to maintain consistency with the tense of the other sentences. Apart from that, the sentence indicates that Stacey has acquired practical skills during her time at the BRIT School.