English homework

All the students and I are very enthusiastic for visiting your college this September. I hope that all of the people have a good time learning English. I am very interested onin learning English and I want all my students learn a lot about this language because it can open many possibilities in the future. In addition, English allows them to communicate with another people from the rest of the world.

I would prefer that the students are with English speaking families instead of in a youth hostel. In my opinion it is the best option because they can practice the language with native people. I think if they are together they are not going to speak in English.

It could be interesting to offer some free-time activities for the students, like you mentioned have said* in the last letter. My group of the students like doing sports, and for this reason I think organizing some outdoor activities could be a good idea. In addition, in general they like going to the cinema and some days we have seen watch films in English to improve their skills.

Finally, we would like to know about the weather because all the students and I don’t know what clothes we should put inside pack in our suitcases. Here, in Spain the weather is hot and we still wear are with our light clothes yet. However, I know the your climate there is a little bit different.

*"have said..." is not technically incorrect, but using "mentioned" helps the sentence to flow a bit better.

*Overall, you have written some great paragraphs! It sounds like your students will have a fun time travelling! Your English is good! I can understand what you are saying, so I have only had to make a few minor corrections and sometimes changing the wording so that your sentence reads more naturally.
*Keep up the good work!