The best way to use the iPad with your UMN Moodle account is through a web browser, NOT the Moodle App. Type moodle.umn.edu into your web browser (i.e. Safari, Google chrome, etc. ) and log in using your UMN username and password. You should be able to access course sites and materials via Moodle on your web browser.
How do I post to a forum?
You are able to type directly to a forum text editor, but best practice is to type your response to in word processing app (like Notes or Evernote) then copy and paste it to the forum. This will help catch spelling and other typos.