Trading Cards does just what it sounds like it does...however, not the baseball variety. One of my favorite parts of this app is that it is specifically designed for the classroom to create 7 styles of trading cards. You can choose between making one for:
Given this, your classroom options are endless. Again, ReadWriteThink has information and lesson plans for using this app.
I also like that (regardless of card type you pick), the app walks you through each box by asking a pointed question that will help you focus on fine-tuning your information per box. My 2nd grader made a cute one for the Mary Pope Osborne "Magic Treehouse" books he's been reading.
Here's my definition card for the environmental term "planned obsolescence."
For my other two GTG posts on RWT's great apps, click here.
My Planned Obsolescence card from the Trading Card app, using my own research. Image on that card from http://www.zazzle.com/planned_obsolescence_shirts-235608848561321715; Trading Cards Logo from http://www.readwritethink.org/classroom-resources/mobile-apps/trading-cards-30922.html