@maria Use the #JigsawMethod to explore a particular topic, build up students background knowledge. Here’s an overview - https://blog.tcea.org/jigsaw-math-classroom/
Then, test their knowledge with one of the many tools available that are fun. #Quizflight, #Vimboard, #Blooket, #Quizizz, #Kahoot! are a few popular ones. 🙂 More info on those here - https://blog.tcea.org/?s=retrieval+testing