ALEX Lesson Plans Subject: Mathematics (9 - 12) Title: Zero Product Property Description: The zero product property allows you to solve a quadratic equation by converting it into two linear equations.  This is a common strategy of algebra- to break down a problem into simpler parts, each solved by previously learned methods.Subject: Mathematics (9 - 12) Title: Discover the Roots of a Polynomial Function Description: In this lesson, students will be re-introduced to the Four Step Problem - Solving Plan.  The plan will be used as a 'checks and balance' tool for discovering the roots (solutions) of polynomial functions.  Students will: *Explore the problem - identify what is given and what they are asked to find. *Develop a plan - look for a pattern, make a model, solve a simpler but related problem.                           *Solve the problem - carry out the plan *Examine the solution - check the results with the conditions in the problem, check the reasonableness of the solution Subject: Mathematics (9 - 12) Title: Now, where did THAT come from? Deriving the Quadratic Formula Description: Generally, teachers expect students to memorize the quadratic formula and to know that you use it after exhausting all other means of solving a quadratic equation, i.e. as a last resort. This technology-based lesson is designed to assist students with deriving the formula on their own. Students must first be familiar with complex numbers and the process of “completing the square.” This lesson plan was created by exemplary Alabama Math Teachers through the AMSTI project.Subject: Mathematics (9 - 12), or Technology Education (9 - 12) Title: Family Ties:  Parabolas Description: This lesson allows students to manipulate the parameters while using the vertex form of the equation of a parabola to see the effects on the graph.  The spreadsheet can be altered for other functions.This lesson plan was created as a result of the Girls Engaged in Math and Science University, GEMS-U Project.Subject: Mathematics (9 - 12) Title: "Factoring by Mack" Description: This strategy for factoring trinomials will eliminate the trial-and-error method used in most textbooks.The lesson will be a direct teaching lesson. With the teacher lecturing and the students taking notes and then having the students break up into groups to solve sample problems.This lesson plan was created as a result of the Girls Engaged in Math and Science, GEMS Project funded by the Malone Family Foundation.Subject: Mathematics (9 - 12) Title: Classifying Complex Numbers Description: This lesson helps students distinguish between strictly complex numbers, strictly real numbers and strictly imaginary numbers while learning that real numbers and imaginary numbers are subsets of the set of complex numbers. Thinkfinity Lesson Plans