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### Dealing With Data In the Elementary School

### If the Shoe Fits...

*Cinderella*story. Students identify similarities and differences between two versions. In addition, they use attributes to classify and sort information.

### Understanding Rational Numbers and Proportions

In this lesson, students use real-world models to develop an understanding of fractions, decimals, unit rates, proportions, and problem solving.

The three activities in this investigation center on situations involving rational numbers and proportions that students encounter at a bakery. These activities involve several important concepts of rational numbers and proportions, including partitioning a unit into equal parts, the quotient interpretation of fractions, the area model of fractions, determining fractional parts of a unit not cut into equal-sized pieces, equivalence, unit prices, and multiplication of fractions.

### Printing Books

*y*-intercepts in the context of printing their algebra textbooks. Students use a spreadsheet to facilitate their exploration. This activity is based on an idea from

*Navigating Through Algebra in Grades 6-8*(NCTM, 2001).

### Patterns and Functions

*discover*the salient features of the pattern,

*construct*understandings of concepts and relationships, develop a language to talk about the pattern,

*integrate*, and

*discriminate*between the pattern and other patterns. When relationships between quantities in a pattern are studied, knowledge about important mathematical relationships and functions emerges.