Forget 20 questions and go for 20 answers.
Ask a question or name a category. The class must then get 20 points within a specified time limit (3 minutes is usually ok). Each person to give an answer scores a point for the class. Anyone repeating a previously-given answer loses the class points (I take off 5 because I’m mean). Once the student gives an answer, they pick the next person to answer.
Could use with word types or just vocab, even answers to questions, depending on your group’s needs. I’d like to hear about how others may adapt this…
If the students hit the target they get a reward.