Auction Game

Prepare a list of sentences, some of which are correct, the rest featuring a grammar (or spelling) mistake.  Students are split into teams of 2 or 3, and given $1,000 (imaginary!) to bid for the sentences.  The idea is that they bid for the ones they think are correct, as the team with the most correct sentences at the end is the winner.

This is a popular activity that gets pretty competitive and makes grammar correction more fun than usual.  If you wish, you can use sentences that the students themselves have said/written in the previous lesson.