You can choose how you do this- it may be using the following tools:
Voicethread - upload a picture and talk around it
Vocaroo (oral retell)
Written - publish straight on
Mindmap (using bubbl.us.com - teckie angles may like to do this with their groups so you can do a bit of teaching around it)
You have 2 weeks to complete the challenge as there is a bit more work in this.
You will also need to make a plan before you start on the blog (I will allow time for this in class)