Modern foreign languages
The language can be simple at KS3 (tall, slim, funny, likes sport) while able pupils at KS4 could elaborate in the conditional tense (My ideal man would give me chocolates. He would not take me to a football match!). For KS4 oral work, sketches based on Blind Date make a refreshing change.
For post-16 - cultural differences: in Germany a traditional wedding kicks off with the civil ceremony and concludes in church two days later; in Spain celebrating guests start late and go on all night.