The Progress Report automatically runs either Weekly or Monthly depending on the frequency setting.   

A new student will not appear on the Progress Report until it has been updated either automatically or manually after the student was added to the class.  

To manually run a new Progress Report, select Run Now on the Progress Report page.  Note: The Progress Report can only be manually run once a day.

Once you have run a new Progress Report, your recently added student(s) will now appear on the Progress Report.