This is a grammar extension activity if you have taught relative clauses and feel your class needs speaking practice in this area.
Firstly, as for the main activity your class may need to use the alphabet quite heavily to complete the activity, it may be of value to recap the pronunciation of individual letters using the following worksheet (depending on how confident your students are with the alphabet).
Find the worksheet here: Dictating and The NATO Phonetic Alphabet
Next we have the main activity which explained fully in the teachers notes at the end of the document. Crosswords are a fun way of practicing relative clauses as long as you ensure students use them in their clues: “3 Down is a city where The Beatles were born”.
This exercise features two corresponding crosswords and is a communication activity in which students for their own clues for the items from UK and USA culture listed on the worksheet.
The activity is suitable for intermediate and above, and also requires that students have at least a basic knowledge of UK and USA culture.
Find the communication activity here : UK and USA Culture