Below please find links to archived Q&A discussion for the Dwolla course.
Exercise 1.1: Introduction to Dwolla
Exercise 1.2: Initializing the Dwolla helper package
Exercise 1.3: Sending money to another Dwolla user
Exercise 1.4: Send money to a non-Dwolla user
Exercise 1.5: Checking your Dwolla balance
Exercise 1.6: Well done! You're a pro.