should the student that are learn english should they only speak english in school why?

Answer 1

The best way to learn a new language is to fully immerse yourself in it - and in that nation's culture if possible.

That is how the foreign exchance student program works...

Answer 2

Obviously you didn't learn English yourself. But, to anwswer your question. Yes, they should speak English. Why you might ask? Because this is the United States of America and English is our native language. So to communicate properly and to obtain all the benefits of education students should speak the language.