Create an account: https://apply.commonapp.org/Login
Complete the information: Fill-in the appropriate information, choose an arbitrary school (the school does not matter), then click on "print preview" to print out a hard copy.
Present to teacher for review (complete short answer question, but the personal essay is the next step for THIS project--you will do this in a separate document).
You will be able to retrieve this information to use to apply to colleges when you are working on this in the summer/fall.