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Cathy Hink

Math: Open Number Line (Source: Open Math by Robert Kaplinsky)

Grades: 2nd Grade, 1st Grade, 3rd Grade
Subjects: Math

Student Instructions

⬅️ Watch the video lesson/directions. 1. Select add to bring a copy to your device. 2. Use pen label or pencil to fill in the number line Directions: Use the digits 1 to 9, at most one time each, place a digit in each box on the number line to make the number line true. Hint: Start with one number and build your number line off of that. Example start in the middle with 39, what numbers could make this a true number line. 3. Use mic when you are done to share your math thinking. BONUS: Solve this in a few ways (use pages 2-4) 4. Select check to save this to your journal.

Teacher Notes (not visible to students)

This is from Robert Kaplinsky's Open Middle Math website: https://www.openmiddle.com/open-number-line/ Big Idea: Number Sense Place Value Number Line

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