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 Exploring Equations This lesson from Illuminations has students study equivalence and systems of equations while identifying and using related functions. It includes an interactive applet that can be used in class. Discussion questions are also included to supplement the interactive material. The lesson is appropriate for grades 9-12 and should require one class period to complete. http://illuminations.nctm.org/Lesson.aspx?id=2707
 Escape From the Tomb This lesson from Illuminations asks students to solve a system of linear equations using a practical math problem. The lesson involves question for students; participants are asked to give a short presentation to the class on their findings. The activity is intended for grades 9-12 and should require 1 class period to complete. http://illuminations.nctm.org/Lesson.aspx?id=2410
 Egg Launch Contest This lesson from illuminations helps to illustrate quadratic equations. Students will determine the maximum value of a quadratic equation and compare different equations. The lesson also asks students to move between table, graph and equations. The lesson is appropriate for grades 9-12 and should require 1 class period to complete. http://illuminations.nctm.org/Lesson.aspx?id=2650
 Determining Functions Using Regression This unit from Illuminations focuses on collecting data and using technology to find functions to describe the data collected. Students will learn to use a calculator to find the curve of best fit for a set of data and demonstrate an understanding of how modifying parameters changes the graphs of functions by writing equations for those functions. The unit includes two lessons intended for grades... http://illuminations.nctm.org/Lesson.aspx?id=4144
 Investigating Pick's Theorem This algebra unit from Illuminations includes three lessons which highlight Pick's Theorem. Students will be introduced to the theorem, determine the coefficients of the equation, and explore the concept of rates of change as a way to find the coefficients. The main math content of the lessons includes systems of equations and rates of change. The material is appropriate for grades 9-12 and... http://illuminations.nctm.org/unit.aspx?id=6040
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