Outline:

1. Mini-quiz
2. Top-down design
   • Top level
   • 2nd level: Exercise 1
   • 3rd level: Exercise 2
3. Bottom-up implementation
   • unit testing: Exercise 3
   • test-driven development
4. Recap for Quiz 3

Reading assignment (to be completed by the next class):

• Zelle sections 9.3-9.6 (pp. 288-307)