• Two white, tent-style math cards are displayed upright on a light gray surface. The card on the left shows two illustrated hands with fingers spread—one with all five fingers raised and the other with four—representing the number nine. The card on the right features a twenty-frame outlined in orange, with seventeen blue dots filling the boxes, used to visually represent quantity.
  • Two white, tent-style math cards are displayed upright on a light gray surface. The front card reads “6 times as many as 4” in large, bold navy blue text. The card behind it shows the expression “1/8 + 1/8 + 1/8” in navy blue, with each fraction written in vertical fraction format.
  • Two tent-style math cards are displayed. The card on the left shows the expression "1,000 ÷ 10³" in large dark blue text, representing division by a power of ten. The card on the right displays the addition equation "649 + 358" in matching bold dark blue text.
  • A hand holds a printed Teacher’s Guide titled "Open Number Line Cards" against an orange and red abstract background. The guide includes instructional text on how to use number lines to enhance classroom discussions and build number sense. A highlighted orange box features a quote from Kristen Acosta emphasizing the value of clothesline number lines. The CESA 6 Smart Thinking logo appears in the top right corner of the document.
  • Two tent-style cards are displayed. The left card shows two bundles of ten sticks each, wrapped with orange bands—representing a visual model for place value or counting by tens. The right card shows a clock face with the hour hand pointing to 4 and the minute hand pointing to 6, indicating the time 4:30.
  • Two tent-style cards are displayed. The left card features a circle divided into 12 equal parts, with 11 sections filled in dark blue and 1 section left white, visually representing the fraction 11/12. The right card shows base-ten blocks: a large red hundred block, six green ten rods, and four yellow unit cubes, representing place value concepts.
  • Two tent-style cards are shown. The left card displays the fraction 9/8 in large dark blue numbers, representing an improper fraction. The right card features a vertical rectangle divided into 10 equal parts, with the top 9 sections filled in orange and the bottom section left unshaded, visually representing the same fraction using a bar model.
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CESA 6

Open Number Line Cards

Open Number Line Cards

$5.00 USD
$5.00 USD
Sale Sold out
Grade/Subject

Bring number sense to life with the CESA 6 Open Number Line Cards, a versatile, interactive math tool designed to deepen students’ understanding of numerical relationships.

Sets designed for grades K-5, these cards invite students to explore whole numbers, fractions, decimals, and more by physically placing cards along a rope or line, sparking meaningful discussions about value, spacing, and scale.

Rooted in best practices from the Standards for Mathematical Practice, this activity prioritizes reasoning and student dialogue over exact answers. Students compare quantities, defend placements, and refine their thinking while visually seeing how numbers relate linearly.

Each set includes:

  • Ready-to-print number line cards 
  • Blank cards for customization
  • Teacher directions with facilitation tips and question prompts

Whether using benchmark numbers or mixing representations like ten frames and tallies in the lower grades or fractions pictures and decimal cards in the upper elementary grades, the Open Number Line Cards support all learners in developing confidence and precision with numbers.

Ideal For:
Elementary teachers, interventionists, and math specialists seeking a hands-on, collaborative way to build number sense.

Type: Digital Download PDF

Sets Types:

  • Kindergarten: 39 pages or 117 cards  
    • Ten frames
    • Double ten frames
    • Tallies
    • Number Racks
    • Fingers
  • 1st Grade: 49 pages or 147 cards
    • Addition and subtraction expressions (within 100)
    • Double-digit numbers
    • Number Racks
    • Ten frames
    • Double Ten frames
    • Bundles of sticks
    • Analog clocks and digital clocks (to the half hour)
  • 2nd Grade: 39 pages or 117 cards
    • Three-digit numbers
    • Addition and subtraction expressions with two-digit Numbers
    • Fractions (rectangles and circles) whole, half, third, fourth
    • Base ten blocks
    • Coins
  • 3rd Grade: 49 pages or 147 cards
    • Addition, subtraction, multiplication and division expressions
    • Fractions as numbers and pictures
    • Rows and columns for area
  • 4th Grade: 57 pages or 171 cards
    • Addition and subtraction of fraction expressions
    • Triple-digit addition and subtraction expressions (within 1000)
    • Fractions and decimals
    • Multiplicative statements
    • Multiplication to powers of ten expressions
  • 5th Grade: Coming Soon

Single Use License:

By purchasing this digital booklet, you are granted a single-user license for personal, non-commercial use. Redistribution, resale, or sharing of this material with others, whether in printed or digital format, is strictly prohibited.

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