The Mathematical

March 2019

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Clothesline Math

The Clothesline is a manipulatable number line that makes the facilitation of class discourse on number sense much more efficient and effective. The Clothesline is dynamic, meaning that the “benchmark” numbers may be adjusted when needed, as well as the values that are placed on the line.

The greatest tool for teaching number sense is the number line. Unfortunately, this simple, powerful vehicle gets left behind in elementary grades. However, used properly throughout the secondary grades, the number line can develop deep, flexible number sense as well as conceptual understanding of variables, signed numbers, rules of exponents, algebraic expressions, geometric relationships, statistics and other key mathematical ideas.

The General Idea

A student or a group are given a set of numbers or expressions (typically a set of 2 or 3) which are written on folded paper (cards) to be properly placed on a hanging number line (clothesline). Class discussion offers opportunity for students to clear up misconceptions, before committing the answer to static paper. It is really is that simple.

This hands-on, visual activity can be done with:

  • decimals
  • fractions
  • percents
  • integers
  • square roots/exponents
  • scientific notation
  • algebraic expressions
  • functions
  • geometry (angles)
  • statistics

For more information, ideas and answer documents, visit the Clothesline Math site.

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Illustrative Mathematics Free Resources

Illustrative Mathematics is providing free access to their library of tasks and resources. These resources allow teachers to find illustrative tasks for grades K - 12 by searching by domain and standard clusters. Each task includes the student task, an IM commentary to help teachers with the student discussions, and the task solution.

Visit the Illustrative Mathematics site to learn more!

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Georgia Milestone Information & Resources

It's that time of year! Below are links to various resources provided by the Georgia DOE for the EOG Milestones. These resources include frameworks, content weights, formula sheets, and example problems.

Assessment Guides:

Formula Sheets:

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PARCC Mathematics Practice Tests

This site provides short practice math tests for grades 3 through 8 and includes Algebra I, Geometry, and Algebra II. These are great practice problems for students and/or teachers to use during review. Practice tests can be done independently online, printed, or projected on the white board for whole group practice/discussion.

Visit the site to access the practice tests.

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Concrete Representational Abstract

Concrete Representational Abstract (CRA) is a three step instructional approach that has been found to be highly effective in teaching math concepts. The first step is called the concrete stage. It is known as the “doing” stage and involves physically manipulating objects to solve a math problem. The representational (semi-concrete) stage is the next step. It is known as the “seeing” stage and involves using images to represent objects to solve a math problem. The final step in this approach is called the abstract stage. It is known as the “symbolic” stage and involves using only numbers and symbols to solve a math problem. CRA is a gradual systematic approach. Each stage builds on to the previous stage and therefore must be taught in sequence. This approach is most commonly used in elementary grades, but can be found in some middle and high school classrooms.
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Pi Day Activity Ideas

Let students discover pi! Provide various circular objects (like cans, paper plates, candles, CDs, bowls, etc) and have the students measure the diameter and circumference using a piece of string or yarn. Then have them divide the circumference by the diameter and see that the answer is about 3.14 every time!

Elementary School:

Middle School:

High School:
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Coweta STEM Recognition

Are you interested in obtaining or renewing your Coweta STEM Recognition? The process is simple!

1) Teach 5 STEM lessons. A STEM lesson typically includes some sort of design challenge for your students. Designing a poster or Google Slide presentation does not count as a design challenge. Teachers may collaborate on lessons together. For example, if your STEM lesson calls for writing (which it should!), partner with an ELA teacher to help!

2) Fill out the STEM Activity log. Briefly describe the 5 lessons on this form.

3) Post one exemplar lesson with student work samples. Pictures or videos of student work so other teachers and students can understand what the assignment leads to using this form.

4) That's it! Now sit back and enjoy the admiration of your colleagues and community.

If you have more questions or would like to discuss lesson plan ideas, contact or You can also find more info at

STEM/STEAM Resources

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Middle School Collaboration Meetings

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Professional Learning

Middle School Math Collaborative Meeting

Mar 27, 2019 - Smokey Road Middle School, 4:00 - 5:00

Collaborative Meeting among 6-8 teachers, review scope and sequence (3nd 9-weeks), and other updates. Please bring a charged chromebook to the meeting.

GIMKIT - A New Way to Review: Instructional Technology Training

Mar 28, 2019 - Werz - PLC, 4:00 - 5:00

Learn about GimKit - an alternative to Quizlet and Kahoot. Training will demonstrate program and how to create your own Gimkit from scratch or from your own Quizlet sets. Join us to learn a new way to engage students during review! (For all content areas.)

Register here.

College Readiness Mathematics Summer Professional Learning

Jun 18-20, 2019 - Dekalb Early College Academy in Stone Mountain, GA, 8:30 - 4:00

This is a three-day, professional learning session which focuses on evidence-based, effective mathematics instructional strategies to assist in preparing students for post-secondary options. Participants must register for this professional learning opportunity no later than May 6, 2019, by completing the registration form at College Readiness Summer Professional Learning Institute.

2019 Summer Mathematics Academies

Available dates in June & July

This is a 2-day workshop offering professional development focused on specific grade bands (K-1st, 2nd-3rd, 4th-5th, 6th-8th, Algebra, Geometry, Algebra II). Areas of focus include improving teacher knowledge, supporting productive struggle, experiencing engaging, rich tasks aligned to GSE standards, and classroom strategies to meet the needs of ALL learners.

Cost: $90 for GCTM members, $120 for non-members

More Info and to Register.

7th Annual West Georgia RESA STEAM Conference

Sep 12th-13th, 2019 - Peachtree City, GA

Conference theme: Fly Me To the Moon...and Beyond

Location: Peachtree City Hotel & Conference Center (Hilton)

2443 Hwy 54 West, Peachtree City, GA 30269

Registration Info: $100 1 day/$200 both days. Breakfast and lunch are included.

More Info and to Register.

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Request a Visit

As you continue to reach towards achieving your goals, please utilize me as a resource. I would love to spend time with teachers and admin during your planning or instructional periods. If interested in a meeting, a class visit, or modeling, please complete this form to request a time. You can also send me an email anytime!
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Clothesline Math. Retrieved from

Research-Based Education Strategies & Methods. (Apr 29, 2012). Concrete Representational Abstract (CRA) Retrieved from

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Comments, Questions, or Concerns?

Please contact Michelle Clarke, Math Content Specialist, with any comments, questions or concerns.