As we worked through using the app for the first time, I had one of my very tech capable students use Air Server to mirror her iPad to the SMARTboard so we could all follow along. If you haven't used Air Server or some other form of mirroring, I highly recommend it. It is a fantastic and easy way to model apps and have students show and share their work.
As we worked through our objective for the day, students circled our starting number, made their "bunny hops" for counting on and then showed the mathematical number sentence by writing it above their work. Using this app kept everyone involved and engaged in our learning and in my opinion, truly helped us to grab onto the concept as we were able to visually represent it and then use that representation to create our number sentences.