**THE OVERLAND TRAIL** Students look at mid-19th-century Western migration in terms of the many linear relationships involved.

**THE PIT AND THE PENDULUM** Exploring an excerpt from this Edgar Allan Poe classic, students use data from experiments and statistical ideas, such as standard deviation, to develop a formula for the period of a pendulum.

**SHADOWS** Students use principles about similar triangles and basic trigonometry to develop formulas for finding the length of a shadow.

**COOKIES** In their work to maximize profits for a bakery, students deepen their understanding of the relationship between equations and inequalities and their graphs.

**ALL ABOUT ALICE** The unit starts with a model based on Lewis Carroll’s Alice’s Adventures in Wonderland, through which students develop the basic principles for working with exponents.