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Inside the Machine G1 to G2 / Week 09 / Wednesday
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Week 09 · Computers Talk to Each Other

Wednesday

Messages in small pieces
// Wi-Fi, the internet and packets
⏱ about 15 min

Wednesday: Messages in small pieces

Rocket sends a big picture to Raven.

"It shows up one piece at a time!"

Raven watches. "What do you notice?"

Nova beeps. "Hint: big messages get chopped up."

Packets

A big message is split into small pieces.

Each piece is called a packet.

Each packet has an address and a number.

Packets can take different paths.

Some arrive sooner. Some arrive later.

The computer at the end puts them in order.

Then you see the whole picture.

If a packet gets lost, it is sent again.

PACKET CHECK
  • Read the question.
  • Tap your answer.
What is a packet?
What does each packet have?
Do all packets take the same path?
A packet gets lost. What happens?
SentenceTrue or false?
A big message is split into packets.?
Packets always arrive in order.?
Each packet has a number.?
The computer at the end puts packets in order.?
WHY THIS EXERCISEPackets can arrive out of order. Numbers help sort them.
SEND A PICTURE
  • Tap a card.
  • Then tap its spot.
1First
2Next
3Then
4After that
5Last
Try it
On paper, draw a small picture.
Tear it into four pieces.
Write a number on the back of each.
Mix them up. Put them back in order.
Safety first
Use paper only. No scissors.
Ask a grown-up before tearing any paper.
Keep small pieces away from babies and pets.
STORY CHECK
  • Read the question.
  • Tap your answer.
What did Rocket send to Raven?
How did the picture show up?
What comes right after you send the packets?
SentenceTrue or false?
Packets can take different paths.?
A lost packet is never sent again.?
Numbers help put packets back in order.?
WHY THIS EXERCISELost packets are sent again. Numbers put them in order.
Draw a picture cut into four numbered packets.

Word Spot: picture, change

Here are new sight words.

Look at each word. Say it. Spell it.

Picture: P-I-C-T-U-R-E.

Change: C-H-A-N-G-E.

FIND THE WORD
  • Listen to the word.
  • Tap it.
Find the word you hear.
Find the word you hear.
Find the word you hear.
Find the word you hear.
FILL THE GAP
  • Listen to the sentence.
  • Tap the missing word.
Look at the ___ in the book.
Leaves ___ color in the fall.

Packet master! Tomorrow we learn who keeps the Wi-Fi password.

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