This curriculum module is designed for students who are taking high school chemistry. Students should already have some experience with the following: (1) Understanding and reading the pH scale; (2) Knowledge of the carbon cycle; (3) Using scientific notation to express large and small values; and (4) Reading chemical equations. This curriculum incorporates a scaled approach to learning. Each module offers activities at five different levels of student interaction, sometimes referred to as Entry, Adoption, Adaptation, Interactivity, and Invention. The early levels are very directed and teacher-driven, which provides important first steps when learning something new. The levels of Adaptation through Invention are more student-directed and open up opportunities to design lessons featuring student inquiry. The levels serve a dual purpose. They are designed to engage students in increasingly sophisticated modes of understanding and manipulating data. They are also intended to help teachers familiarize themselves with online tools for accessing data and to provide them with models for integrating the use of real data into their classroom practice. (Contains 3 footnotes.)