Kahoot is a review game that engages every student on every question. Questions can be simple recall to more complex. They get immediate feedback and it is very competitive, but most of all they love it.. People attending will learn how to set up the game for their classes, borrow from already made kahoots, and how to use the data to see what needs to be retaught. Quzilet is another form of review that lets students use different formats to quiz themselves. Attendees will learn how to enter questions and how to use different games from the one set of questions entered. Both games require a mobile device (phone, iPad, etc)
I have taught for 37 years and realized early on that staying up with technology is a key to longevity and keeping students engaged makes classes go a lot more smoothly.