Teacher Script & Notes
What to say / Spoken Script
Welcome class! Today we are looking at integer operations. We use a number line to visualize integers. Let's start at 0. When we add a positive integer like +3, we move 3 steps to the right. Let's trace this path to end up at positive 3.
What to do / Action Guide
Point to the green arrow on the screen moving from 0 to +3 on the number line.
Pedagogical Tips
Remind students that 'positive' means moving right, which is the default direction of numbers growing larger.
What to say / Spoken Script
What happens if we subtract 5? Or add -5? They mean the same movement! We move to the left. Starting from our position at +3, we take 5 steps to the left. Let's trace it. We cross 0 and land on -2.
What to do / Action Guide
Highlight the red arrow showing the leftward transition from +3 to -2.
Pedagogical Tips
Emphasize that adding a negative is identical to subtraction. Both represent moving left on the number line.
What to say / Spoken Script
Now let's review multiplying signs. A positive times a positive is positive. But a negative times a negative becomes a positive! Think of it as 'the opposite of moving backwards'. Let's memorize this table.
What to do / Action Guide
Display the sign rules matrix. Point to the negative times negative rule.
Pedagogical Tips
Provide a real-life analogy, like 'taking away a debt makes you wealthier'.
Step 1: Introduction
Step 1 of 3
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