P01 Thinking Graphically (1) Length: 10 minutesComplexity: Easy Homework for Thinking Graphically: Beyond the Obvious
P03 Counting Principles Length: 10 minutesComplexity: Easy Homework for Counting Principles: The Fundamentals
P08 Graphical Interpretation Length: 10 minutesComplexity: Easy Practice of Graphical Interpretation: Advanced Techniques
