Popplet for Consolidation

In my Grade 12 College Chemistry class we are mid-way into the Organic Chemistry unit. This unit has always posed some difficulty for students because of the content and it is not easy. I have always wanted students to mind-map their work through the unit and I've even made a mind map of my own to help visualize the unit.

My project focuses on higher order thinking and engaging students using technology in consolidation activities. SO... at the end of each lesson on a different functional group (ie. alcohol, ketones, carboxylic acids) students consolidate in two ways:

1) what I've always done - cue cards (yes paper ones). One cue card per functional group plus one card per reaction type. Why paper? These cards (only some of their 'deck' is allowed into the unit test, and even fewer for the exam) are study tools and I am also trying to teach students study skills.
2) MIND MAP with Popplet.com. In partners students can consolidate learning and draw out relationships between different molecule types.

WHY POPPLET:
1) it is an app (paid) for iPads.
2) students can collaborate (live) on the app.
3) It is accessible outside of the ipad (HUGE plus!) so students can work on their mind maps at home.
4) It can easily be shared with me for assessment at the end of the unit.
5) It is HUGE! The popplet goes on for ever!

The only "con" is that this is a paid app.

I like how easy it is for students to share their work with me AND access at home. This makes it a real study tool that lives beyond the iPad. It is great to see students pull out their notes to consolidate their work in pairs and look at other groups' maps and compare how they are setting them up.