Lesson Planet
Search educational resources
  • Sign In Try It Free
  • AI Teacher Tools
    • Discover Resources Search reviewed educational resources by keyword, subject, grade, type, and more
    • Curriculum Manager (My Content) Manage saved and uploaded resources and folders To Access the Curriculum Manager Sign In or Join Now
    • Browse Resource Directory Browse educational resources by subject and topic
    • Curriculum Calendar Explore curriculum resources by date
    • Lesson Planning Articles Timely and inspiring teaching ideas that you can apply in your classroom
    • Our Story
    • Frequently Asked Questions
    • Testimonials
    • Contact Us
  • Pricing
  • School Access
    • Your school or district can sign up for Lesson Planet — with no cost to teachers
      Learn More
  • Sign In
  • Try It Free
Illustrative Mathematics: A Rei Solution Sets Lesson PlanIllustrative Mathematics: A Rei Solution Sets Lesson Plan
Publisher
Illustrative Mathematics
Resource Details
Curator Rating
Educator Rating
Not yet Rated
Grade
9th - 10th
Subjects
Math
2 more...
Resource Type
Lesson Plans
Audiences
For Administrator Use
1 more...
Instructional Strategy
Independent Practice
Lexile Measures
1080L
Lesson Plan

Illustrative Mathematics: A Rei Solution Sets

Curated by ACT

For this task, students are shown the graphs of two equations, with areas bounded by their lines and intersections shaded in different colors. They are asked to write a system of equations or inequalities for each shaded area and explain their mathematical choices. Aligns with A-REI.D.12.

3 Views 1 Download
CCSS: Designed

Concepts

systems of equations, systems of inequalities

Additional Tags

system of equations, system of inequalities, a-rei.d.12, cc by-nc-sa 4.0, ccss.math, creative commons attribution-noncommercial-sharealike 4.0, hsa-rei.d.12, illustrative mathematics, illustrative mathematics: a-rei solution sets, illustrative mathematics: a-rei solution sets hsa-rei.d.12, oh.math.hsa.rei.12, solution sets, graph solution set to system of linear inequalities in two variables as intersection of corresponding half-planes

Classroom Considerations

  • Knovation Readability Score: 3 (1 low difficulty, 5 high difficulty)
  • The intended use for this resource is Instructional|practice

Common Core

HSA-REI.D.12

View 12,212 other resources for 9th - 10th Grade Algebra I

© 1999-2026 Learning Explorer, Inc.
Teacher Lesson Plans, Worksheets and Resources

Sign up for the Lesson Planet Monthly Newsletter

Open Educational Resources (OER)

  • Health
  • Language Arts
  • Languages
  • Math
  • Physical Education
  • Science
  • Social Studies
  • Special Education
  • Visual and Performing Arts
View All Lesson Plans

Discover Resources

  • Our Review Process
  • How it Works
  • How to Search
  • Create a Collection

Manage Curriculum

  • Edit a Collection
  • Assign to Students
  • Manage My Content
Contact Us Site Map Privacy Policy Terms of Use