In this lesson, students consider different methods of selecting a sample. Students begin by critiquing different sampling methods for their benefits and drawbacks. In particular, students notice that some sampling methods are more biased than others. A follow-up activity shows that some methods may seem to be unbiased at first, but they actually have a hidden bias that restricts the sample from being representative of the population (MP1). Finally, students practice constructing arguments for why they believe a sampling method is likely to be biased (MP3), and they see that selecting a sample at random is more likely to produce a representative sample.