I made a quiz with 22 questions. The first class made it through all the questions twice, but were just as into the second round as they were the first.
I checked out an iPad cart for my class. I think next time I will have them use their cell phones or change my seating arrangement because some of my lovelies were just watching what other people were choosing ... that's right ... cheating during a review game ... welcome to high school ...
There are a lot of already made Kahoots, that may already be perfect for your class.You can check out my Kahoot over Biology since the beginning of the year.
Try Kahoot out and let me know what you think.