Kahoot was recommended to me by other PLC member. The students absolutely LOVE playing Kahoot on the iPads. The one problem I do have with Kahoot however is that even if you get the right answer, the score is based on timing and not all of my students process as quickly as others. Something that I recently tried was to give my students a review for their quiz (on paper) then use the same questions on the Kahoot. So, all of the work was on the students paper they just needed to check the answer they already found to submit it. At first I did the Kahoot with all of the questions in order to make it easy, then for fun we jumbled up the Kahoot questions so students would have to find the correct one on their paper.