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View Resource Successive Discounts

This lesson uses the example of successive discounts at a retail store to demonstrate numeric, algebraic, and graphical representations of compositions of mathematical functions. Students will get the opportunity to determine equivalent expressions for compositions of functions. The material includes a student activity sheet and example questions. The lesson is intended for grades 9-12 and should...

View Resource Squares On A Triangle

This lesson will help students understand the law of cosines and the Pythagorean theorem. The material has students find out whether a triangle is acute, obtuse, or right; determine a formula for the law of cosines to relate the sides of any type of triangle, and explain how the Law of Cosines is an extension of the Pythagorean theorem. Student activity sheets are included. This material is...

View Resource Smokey Bear Takes Algebra

This interdisciplinary lesson ties earth science concepts in with algebra. The forest-fire danger rating index is applied to a mathematical model. Students will learn real-world meaning of the intercepts and slope in the Angstrom index as well as how to model the relationship between the slope of the land versus rate of fire spread. The material includes student activity sheets. It is intended...

View Resource Shedding Light on the Subject

This algebra unit from illuminations provides an in depth exploration of exponential models in context. The model of light passing through water is used to demonstrate exponential functions and related mathematical concepts. The unit includes 4 lessons, each of which has a variety of student materials. These lessons are most appropriate for grades 9-12 and should each require 1 class period to...

View Resource The Devil and Daniel Webster

This lesson from Illuminations helps illustrate recursive sequences. The interdisciplinary lesson uses elements from the short story The Devil and Daniel Webster by Stephen Vincent Benet. A mathematical game has been created from the example of the story. A worksheet for the game is provided. The lesson will help students to use recursive or iterative forms to represent relationships, approximate...

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