Groups of 3 or 4. Select a pupil at random to choose a number. Click on the number (on your computer) to reveal a word. All pupils have 30 seconds to write a sentence using that word. The most impressive (and correct) sentence wins a point for their team.
Alternatively, in two teams: one team chooses a number. Click to reveal the word. Pupils on that team produce a sentence using the word for 2 points. Maybe you could offer a bonus point to the opposite team if they can improve it.