Books are tougher to recommend because here it depends on their reading ability in English AND the foreign language. We have LOTS of easy readers - in French, Spanish, German and Italian many include audio cds so they can listen to a native speaker read the story aloud. I can make specific recommendations individually.
Audio cds are tougher for this age too - face it, they want to listen to their own music! I recommend any of Etienne's CDs for French or Spanish, Lingo Tech for German. DVDs are tough - finding authentic films appropriate (G-PG) for middle schoolers, but here are a few:
Spanish - Casi Casi, Carol's Journey, Under the Same Moon
French - Asterix, Tintin, My Father's Glory, My Mother's Castle, Small Change, L'Avion, Etre et Avoir, Les Choristes,
German - For these you need a code-free dvd player! - german-films-and-asterix-titles---german-and-german-dialects.cfm
Asterix, Emil und die Detektive, Pünktchen und Anton DVD, Momo, Vorstadt Krokodile dvd
Chinese - The Road Home, Warm Spring
You have to email me for other languages - firstname.lastname@example.org