8. Wrap-Up: All-Star Passing Drill


In this activity, you created a passing drill in which the sprite sensed other sprites, the edge of the stage, and key presses.

Scratch's sensing blocks allowed you to make a fun, interactive game.

Computer scientists use a computer's ability to sense, to make their programs react to the world around them.

Many sensing computer programs are used to help others and improve, or even save lives.

That's pretty powerful stuff.

For example, sensors alert rescue workers to the location of natural disaster victims.

This robot uses infrared sensors to find warm areas.

Humans give off more heat than debris, so the warm areas are likely to be people.

This robot also uses its sensors to map the land as it moves, so it is less likely to get caught by debris.

Robots can survive harsher situations than humans, and find people more accurately, thanks to sensing.

Sensors don't have to be attached to robots to save lives.

This clip from the Open University Computer-Animal Interaction Lab shows how a dog uses special sensors to help people with medical conditions.

So we are developing a dog-friendly alarm system that disability select dogs can use to call for help when their human loses consciousness.

(soft, playful music)

When the dog triggers the alarm, by pulling a specially designed tag, the technology calls a family member or the emergency services.

That's pretty sweet.

The device senses when a dog pulls on the tag and sends for help, possibly saving the life of someone who has fallen unconscious, or had a seizure.

Computer scientists like you help save lives using sensors all the time.

Next time, in Google CS First Sports, you will create a home run derby game in which you'll calculate the baseball player's stats.

Get ready to crunch some numbers and improve your swing.

As you reflect on today's activity, consider these words from American soccer legend, Mia Hamm.

She said, "Failure happens all the time.

"It happens every day in practice.

"What makes you better is how you react to it."

She would know.

With a grueling practice schedule, she led the North Carolina Tar Heels to four consecutive National Championships, and two FIFA World Cup Championships with the Women's National Team.

Her first was at age 15, and the other was an epic battle versus China that came down to a single penalty kick.

Next time you fail at something, remember that it happens to everyone, even sports greats.

The best part is, you get to choose how to respond to failure, and use it to help you grow.

See you next time.

  • "New technology to support dogs to help humans" by OUresearch on YouTube ( -- Licensed by Creative Commons Attribution 3.0 Unported ( -- Video trimmed to needed length, audio removed