Why are there NO SUBTITLES on the elf DVD ???????????????

Rating: 6/10 (16 December 2009)

I am an ESL teacher, and at this time of year, I would really love to show the movie elf to my students, WITH SUBTITLES!!! My husband and I own many DVDs, including a deluxe copy of elf. Every other DVD that we own has subtitles in English, and many have subtitles in other languages as well. For some unknown reason, despite the fact that our deluxe edition of elf includes soundtracks in both English and Spanish on both the Widescreen and the Fullscreen DVDs, I cannot find ANY subtitles! I have played both discs on our DVD players and on my MacBookPro, and am not able to find ANY subtitles!
Why, on earth, would a movie company produce a DVD without subtitles????????? My students are not fluent speakers of English, and it is very helpful for them to be able to view movies with subtitles!! Do you have any suggestions????