The need for the assignment was clearly stated and straight to the point. I believe this age group will enjoy creating digital timelines. Having students create a running compilation of current events seems more interesting than just keeping a journal. Students will be able to bring their writing to life. I also like the sense of community you are creating having students visit their classmates blogs.
I am very interested in how you are going to incorporate Edmodo. I have yet to use this social network. Therefore, I'm not sure how to effectively use the networking tool.