## Interactive Highlights

## New Interactives

This three-part example illustrates the use of iteration, recursion, and algebra to model and analyze the changing amount of medicine in an athlete's body. This example is adapted from High School Mathematics at Work , a publication from the National Research Council (1998, p. 80). These activities allo...

Using interactive figures, students can investigate how changing the height of a rectangle with a fixed width changes its area. As discussed in the Number Standard , understanding multiplication by fractions and decimals can be challenging for middle-grades students if experiences with multiplication ...

This example allows students to explore three methods for measuring how well a linear model fits a set of data points. The Data Analysis and Probability Standard calls for students to explore how residuals (the difference between a predicted and observed value) may be used to measure the "goodness of ...