Skim through Hartl rails tutorial chapter 1. We have covered most of this already, but there are some great sections that go in depth with Unix commands, explaining the purpose and structure of Rails, Git commands, and several other concepts that are worthwhile to review.
Complete CH 3 and CH 4 of the Hartl rails tutorial, individually.
Skip step 3.1 where Hartl has you create a new project in your workspace and cd into it. Just set up your rails project and work from the top level. You should not have to run rails new at all.
They use Bitbucket, please use GitHub instead.
Once your teammate has completed CH 3 and 4 of the tutorial, pull down their project and run it within Cloud9 to verify that it works correctly.
Also, run the tests to make sure they are green (we will be checking this).
Modify the homepage to include a line that says verified by: YOUR NAME in the footer.
Optional
Read the Hartl rails tutorial chapter 2 to get an inside look at building another application, similar to what you did last week.