Classroom Resource

Inequalities on the Number Line

Subject Area

Mathematics

Grade(s)

9, 10, 11, 12

Overview

In this Desmos activity, students explore linear inequalities and make connections among multiple representations (including algebraic expressions, verbal statements, number line graphs, and solution sets). There are a series of 3 videos available to fully teach this concept. The videos are labeled "Inequalities on the Number Line," "Compound Inequalities on the Number Line," and "Absolute Value Inequalities on the Number Line." This activity should be used to help teach a lesson on solving linear inequalities. This Desmos activity offers sample student responses and a teacher guide.

Content Standards

Mathematics (2019) Grade(s): 09-12 - Algebra I with Probability

MA19.A1.11
Create equations and inequalities in one variable and use them to solve problems in context, either exactly or approximately. Extend from contexts arising from linear functions to those involving quadratic, exponential, and absolute value functions.

Unpacked Content

Vocabulary

Variable
Equation
Inequality
Solution Set
Identity
No solution for a given domain
Approximate solutions

Knowledge

Students know:

When the situation presented in a contextual problem is most accurately modeled by a linear, quadratic, exponential, or rational functional relationship.

Skills

Students are able to:

Write equations in one variable that accurately model contextual situations.

Understanding

Students understand that:

Features of a contextual problem can be used to create a mathematical model for that problem.

Interdisciplinary Connection(s)

Link to Resource

https://teacher.desmos.com/activitybuilder/custom/57d9fdc6ebf48f73093807b2

Content Type / Source

CR Resource Type

Learning Activity

Resource Provider

Desmos

Accessibility

Text Resources: Content is organized under headings and subheadings

License

License Type

Custom

Custom License Type (URL)

https://www.desmos.com/terms

Comments or Notes

Desmos's mission is to help every student learn math and love learning math. Teachers can explore and enjoy Desmos collections of free digital math activities that include:

Meaningful feedback by showing students what their answers mean, then give them the opportunity to improve their thinking and revise their work.
Collaboration by using devices to connect students, not to isolate them. Students see their classmates' thinking. They ask each other questions and create challenges for each other.
Invite students to solve challenging problems using the tools they already have.

If the teacher does not have an account, he/she will need to create a FREE account. (More information on how Desmos works can be found at Getting Started.)

Once the teacher has selected an activity to run, he/she will need to click on the "Create Class Code" button. This will generate a unique class code and a link to view the dashboard. (More information can be found at Creating a Class Code.) Every new activity will need a new class code in order to start a session. Students cannot start the activity until they have the class code so sessions can be started days, hours, or mere minutes before the teacher plans to run the activity. When the teacher is ready to have students start, have the students go to student.desmos.com and enter the class code. Although it is not required, Desmos strongly encourages students to sign in with their Desmos Student Account. Signing in allows students to resume and view their past activity work.

Approved Date

2020-06-08

Curated by

yvetteakridge

Design by Adaptive Theme

Learning Resource Type