I like these, I particularly like the bookr app. This app has so many ways to use it in the classroom. The kids could do projects about a science topic and present it in this format to make it different from a PowerPoint. They could work together to research what they want to present on their page then the class could make a book that you could publish and buy for your classroom. SUPER COOL!
I also like the trading cards. What a neat way to make vocab cards, cards for projects (ex different habitats) . They could find a pic to make their cards, save the cards then you could even put them on the activboard flipchart! The possibilities are endless.