Using bubbl.us was a new experience for me. I could use a map of how to solve two step equations in my classroom. The students could be assigned to create their own problem and make their own map for it. This will allow the students to practice writing in math.
Another possible assignment would be half the class would be given the description of what's happening in the 2 step equation and the other half of the class would be given the algebra work. So, each student would have to either write a description or write out the algebra steps depending on what they are assigned.