Hello to the folks in the grade Math Makes Sense group! It was great to see you all yesterday. For those of you who weren’t able to attend, we talked a bit about the notion of integers and students’ experiences with modelling them on number lines. I described this particular applet to you, but thought it best if I sent it out for real… :)

Try the **JUMPING NUMBER LINE**. **It asks students to arrive at a target number by “jumping” a certain distance in either a positive or negative direction…** **In this example I am aiming for the number 4.** I have to use all four of the arrows. I must start at zero. Fortunately, I can reverse the direction of the bounce my clicking the direction button in the middle of the page…

This next applet **uses green and blue bars to represent positive and negative integers**. You create 2 bars of any length, then indicate by dragging dowon on a pull-down menu the operation that is happening between them. They are placed on a number line and you can choose to show the total or figure it out yourself. I liked this one… It’s simply called **NUMBER LINE** and require Flash Player to run… I had more success using **Firefox** with this one.

Here’s a screen shot of the game. I created 2 bars – one was -10, the other was +10. I chose the operation of subtraction, and asked that the answer be displayed…

Carole

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