Miami Central Senior High School Algebra 1 (Honors) 2010-2011 Lesson Plan GRADE 9th Algebra 1 Date ___12/15/2010___ TEACHER OBJECTIVES: The teacher will provide the student an opportunity to: Provide a clear explanation of how to recognize slopes of parallel and perpendicular lines and effectively differentiate instruction to meet all student learning needs STUDENT LEARNING GOALS: (given to student) After this lesson you will: Write the equation of a line that passes through a point that is parallel/perpendicular to a given line. SUNSHINE STATE STANDARDS: Body of Knowledge: ALGEBRA Standard Linear Equations & Inequalities Objective(s) Student will understand the concept of parallel and perpendicular lines and the relationship of their slopes NGSSS MA.912.A.3.10 MA.912.G.1.4 PREPARATION Discuss Key Vocabulary Terms (reciprocals, parallel, perpendicular) MATERIALS Graph Paper Geo Sketchpad Protractor (angle measures) Discoverylearning.com Essential Questions The following key questions are addressed in this lesson: 1. What is connection between the slopes of two parallel lines? 2. How can you distinguish between the slopes of two lines that are perpendicular as opposed to two lines that are parallel? Key Vocabulary Parallel Perpendicular Slope Point-Slope Form Slope-Intercept Form Multiplicative Inverse Y-Intercept Reciprocal Ordered Pair CLASS OPENING Graph a linear equation Use Geo Sketchpad to introduce the concepts of parallel/perpendicular lines and their slopes. Discuss Key Vocabulary AGENDA Do Now: Graph linear equations and discuss the different components of an equation written in slope-intercept form. Discussion: Introduction of parallel and perpendicular lines and their slopes Geo Sketchpad: Graph parallel and perpendicular lines given Topic “_Parallel and Perpendicular Lines_” Activities Students will be given an equation in slope-intercept form. They will have to construct a line parallel to the given equation that passes through a given point. Students will be given an equation in slope-intercept form. They will have to construct a line perpendicular to the given equation that passes through a given point. After students construct the lines for both parallel and perpendicular lines, the student should be able to graph and write the equation of parallel and perpendicular lines. Extention Activity: Students who are able to complete the prior activities will be given problems in standard form to graph. Home Learning Assignment If students did not complete the classroom practice, students were required to complete the assignment at home.

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# Grade 9 (Perpendicular and Parallel lines)