After class, I remember a game my friend who teaches high school uses all the time. Kahoot allows you to create an online quiz, and when you hit play, it gives you a code that people can enter to play. So, they can use their phones or their laptops to go to the kahoot website, type in the game code, and the whole class can play together. It’ll keep track of everyone’s answers, and declare the winner at the end.
It could be something really cool to use for grammar/mechanics.