You're assuming of course that the Montana School didn't provide them with any instructions or directions in Arabic when they signed up for the course. One would have to believe that the school sent instruction packets to each and every student before they left Egypt for Montana. Why couldn't the packet have been in the language of their country as well as English? And why wouldn't they have to possess some understanding of the English language in order to be enrolled in the English Language/History/Culture program to begin with? It was a month long program. You can't possibly teach someone to speak fluent English or learn the history and culture of this country in such a short time unless they have the ability to communicate at least a bit in English already.
Because the packet was in English? How's that one. Think about it. These guys were on their way to Montana for English enrichment. Must be a reason for that.