How Can We Sort Our Junk? Can You Roll Your Tongue? How Expensive Is Your Name? How Tall Were the Ancestors of Laetoli? What Do Frogs Eat? These are a few of the 20 data analysis and probability investigations in Bridging the Gap (BTG).

The module's investigations are written as guides for teachers to implement straightforwardly in their K-8 classrooms. Each investigation is based on the four-step statistical process as defined by the Guidelines for Assessment and Instruction in Statistics Education (GAISE):

1. Formulate a question that can answered by data
2. Design and implement a plan to collect appropriate data
3. Analyze the collected data by graphical and numerical methods
4. Interpret the analysis in the context of the original question

Each investigation contains:

• A descriptive Overview that discusses the big ideas presented in the investigation
• A list of Learning Goals that describe what students will be able to do as a result of completing the investigation
• A reference to the Common Core State Standards for Mathematical Practice, Common Core State Standards Grade Level Content, and NCTM Principles and Standards for School Mathematics
• A list of the Materials needed for the investigation
• A suggested Estimated Time, with the number of days needed to complete the investigation
• Instructional Plan that follows the four-step statistical process as defined by GAISE
• An Example of Interpret the Results report that students need to write for each investigation