# ALEX Resources

Narrow Results:
 Lesson Plans (1) Classroom Resources (3)

ALEX Lesson Plans
Subject: Mathematics (7)
Title: Writing and Solving Equations Using Angle Terminology
Description:

This lesson will enhance mathematical vocabulary knowledge and reinforce basic skills for solving equations. Mathematical vocabulary is a vital part of this lesson. The lesson will challenge the minds of seventh-grade students with the theory of angles. The student will use the information in the diagram to write an equation and solve for the variable. Terms that will be identified in the lesson are as follows: supplementary, complementary, adjacent, parallel lines and transversal, and vertical angles.

This lesson results from the ALEX Resource Gap Project.

ALEX Classroom Resources
Subject: Mathematics (7 - 8)
Title: Supplementary Angles in Trapezoids | School Yourself Geometry
URL: https://aptv.pbslearningmedia.org/resource/geometry-trapezoid-angles/supplementary-angles-in-trapezoids-school-yourself-geometry/
Description:

You'll learn how to prove that every trapezoid has two pairs of supplementary angles with this interactive video from the School Yourself Geometry series.

Subject: Mathematics (7)
Title: Grade 7 Mathematics Module 3, Topic B: Solve Problems Using Expressions, Equations, and Inequalities
Description:

In Module 3, Topic B, students use linear equations and inequalities to solve problems. They continue to use bar diagrams from earlier grades where they see fit but will quickly discover that some problems would more reasonably be solved algebraically (as in the case of large numbers). Guiding students to arrive at this realization on their own develops the need for algebra. This algebraic approach builds upon work in Grade 6 with equations (6.EE.B.6, 6.EE.B.7) to now include multi-step equations and inequalities containing rational numbers (7.EE.B.3, 7.EE.B.4). Students solve problems involving consecutive numbers, total cost, age comparisons, distance/rate/time, area and perimeter, and missing angle measures. Solving equations with a variable is all about numbers, and students are challenged with the goal of finding the number that makes the equation true. When given in context, students recognize that a value exists, and it is simply their job to discover what that value is. Even the angles in each diagram have a precise value, which can be checked with a protractor to ensure students that the value they find does indeed create a true number sentence.

Subject: Mathematics (7)
Title: Grade 7 Mathematics Module 6, Topic A: Unknown Angles