Losing shipments?
![lesson-header](https://assets.education.lego.com/v3/assets/blt293eea581807678a/blt80958dbe8f9c9e27/610949cb3ea66f3ecbdbd093/lesson-header.png?locale=en-au&auto=webp&format=jpeg&width=1800&quality=90&fit=bounds)
Of course everybody wants to know where their packages are. That’s why we use tracking systems.
Can you give an example of a tracking system?
Build the Tracker.
![student-02](https://assets.education.lego.com/v3/assets/blt293eea581807678a/bltfb82699e5c10948c/610949f6f57b2f35921c3d33/student-02.png?locale=en-au&auto=webp&format=jpeg&width=1800&quality=90&fit=bounds)
This fabulous piece of tracking system technology will follow the location of your packages in real time. But first, you’ll have to build it:
- Tracker Top
- Tracker Bottom
Get the Tracker ready!
![student-03](https://assets.education.lego.com/v3/assets/blt293eea581807678a/blt73bafe8c497fb822/61094a30f0c97e39497da094/student-03.png?locale=en-au&auto=webp&format=jpeg&width=1800&quality=90&fit=bounds)
Load a sheet of paper into your tracking system and test each of its movements.
The tracker should follow:
- A horizontal line (left-right)
- A vertical line (up-down)
Track the parcels on the city map.
![student-04](https://assets.education.lego.com/v3/assets/blt293eea581807678a/blt9a383798afdb4355/61094a5d4a72ef3a8c6eccf5/student-04.png?locale=en-au&auto=webp&format=jpeg&width=1800&quality=90&fit=bounds)
Load the city map into your tracking system and combine these programming stacks to follow the route.
Is it there yet?
![student-05](https://assets.education.lego.com/v3/assets/blt293eea581807678a/blt475c3d66cae29fe6/61094a893ea66f3ecbdbd0ab/student-05.png?locale=en-au&auto=webp&format=jpeg&width=1800&quality=90&fit=bounds)
You can use the same programming stacks but this time the path has a few tricky parts!
How did you do?
![Kyle-Kate-Reflect.png](https://assets.education.lego.com/v3/assets/blt293eea581807678a/blt1cc863d0312d5cbe/60e4041741f53e1ed05e1b6c/Kyle-Kate-Reflect.png?locale=en-au&auto=webp&format=jpeg&width=1800&quality=90&fit=bounds)
What did you do well? Is there anything you could’ve done better?
Your package has been delivered!