I use Kahoot as a review for test. I also make it a challenge to see who can get the most questions right or medal in the top 3 positions

I mainly used this with my Nutrition and Wellness and Foods classes.  When we were learning about al the different types of nutrients, there was a lot of detailed information.  I thought it would be helpful for the students to see the information in a quiz type format before the test.  We did the Kahoot a couple of days before the test, which allowed me to see what the students had grasped and also to see what they needed to review a little more.