Great for boosting confidence in speaking exams. The examples I have given are in German but you can easily adapt it to different languages and abilities. You'll need to print off picture stimulus and give each student a bingo card. In small groups, students pick up a picture card and create a sentence about the picture which includes a grammar element from the bingo square. The rest of the group must assess if the sentence is grammatically correct. If it is, then students tick off that square and the next person has their turn. The winner is the first person to tick off all squares.