Could you please check these sentences?

Thank you.

1) We're looking for a high school in which subjects such as biology or geography are taught in English so that in the future our students could carry out a project on a common theme in English.
2) I really hope your school is interested in such a project.

Both are fine.

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Both of them are correct.They are okay.

Certainly, I'll be happy to check those sentences for you.

1) We're looking for a high school in which subjects such as biology or geography are taught in English so that in the future our students could carry out a project on a common theme in English.
This sentence is grammatically correct and makes sense. It conveys the idea that you are searching for a high school where certain subjects are taught in English, allowing your students to conduct a project in English later on.

2) I really hope your school is interested in such a project.
This sentence is also grammatically correct. It expresses your hope that the school you are referring to is interested in participating in the described project.

Overall, both sentences are clear and convey your message effectively. Well done!