Adding Integers Lesson: Number Line Model, Grades 6-8

Adding integers on a number line is the most visual way in, and this lesson makes it a single rule: start at p, then move |q| units, right if q is positive and left if q is negative. Where you land is the sum. Students see it on a horizontal line and on a vertical one, a thermometer, so a rise or drop in temperature reads as the same move.

What's inside

• 15 slides, with speaker notes on all 15
• Lesson plan, 2 pages: standards, materials, objective, a teacher-guided sequence keyed to slide numbers, a "Watch For" note and a 25-minute version
• Scaffolded notes, 1 page, fill-in-the-blank to match the slides
• Practice worksheet, 2 pages: 16 practice items (7 on the number line, 6 in context, 3 find-the-error or explain)
• Exit ticket, 3 questions, two per sheet
• Answer key, 3 pages, with every step worked
• Print-all PDF, 9 pages: the lesson plan, the student pages and the answer key in one file

Answer key included

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