"Beat the clock" is a fun activity that takes my class typically 10 minutes.
This activity focuses on the Present Perfect tense, and I use this activity to accompany the Spanish series Extr@, since I teach the Present Perfect tense as the class watches the series.
The answer key is included, along with instructions on how to play the game.
Below are simplified instructions to the game:
1) Students will fill in the correct conjugations as quickly and accurately as they can.
2) When an individual student finishes, they will record their time at the bottom.
3) Then, once students are done, you will go over the answers with them, and for each mistake, they will add 5 seconds to their time.
4) The student with the lowest time wins! You can tweak it if if you have a large class, so maybe the lowest 3 times, for example.