Data Representation - Lesson 1

1. Log on to your account.

2.

Go to Google Classroom.

3.

Go to your IT class.

4.

Go to classwork.

5.

Go to the Data Representation Unit.

6.

Select Lesson 1.

7. Open up the google slides for this
lesson.

Getting Ready for Your Lesson

1

IT room rules:

1.No eating or drinking.

2.Do not move chairs.

3.Bags under desk.

4.Coats on back of chair.

5.Planner open on desk.

6.Respect others.

7.Respect all equipment.

8.Be ready to learn.

Why do you think
people invented

writing?

Discuss

Starter activity

Lesson 1

Across Time and Space

Year 8 – Data Representation -from clay to silicon

Uncover the problems we solve through writing.

Discover how Computing is also about solving
these problems.

In this lesson, we will...

Objectives

Examine the exhibits.

There are different types of representations.

There are different types of information.

Activity 1

Museum visit

Why do you think people needed to write that information down?

Accounts and inventories
History, poetry, and literature
Magic spells
Laws and contracts
Astronomical observations
Mathematics
Music

Poll

Have you ever visited a museum?

• Yes

• No

Why do you think people needed
to write that information down?

Activity 1

Think, write, pair, share

Share your answers with the rest of
the class.

Accounts and inventories
History, poetry, and literature
Magic spells
Laws and contracts
Astronomical observations
Mathematics
Music

Multiple Choice

Select the correct reasons why people needed to write down information.

• To help with maths

• To record money and accounts

• To write down how to write music

• All of these

Why do you think people needed to write that information down?

Activity 1

To store it (across time)
To communicate (across distance)
To process it

Sequences of symbols can represent
any piece of information.

Computers need to store, process,
and communicate information.

Computers use sequences of
symbols to represent information.

Reflection - link to Computing

Activity 2

Choosing representations

Who decides on what these
sequences of symbols mean?

In which situation would each
representation be used?

Here are a few additional examples
of sequences of symbols, which
represent information.

Multiple Select

In what situation could this representation be used?

Select two answers

• To find your location on a map

• To find information about an item in a food package

• To find information about the weather

• To find information about the cost of a clothes item in a shop

Activity 2

Choosing representations

What do you this these symbols represent?

Multiple Choice

What do these symbols represent?

• Drawing symbols

• International symbols and letters for the alphebet

• Shaps used in maths

• Shapes used in science

Activity 2

Choosing representations — link to Computing

Who decides on what these
sequences of symbols mean?

We (humans) agree on meaning.

In which situation would each
representation be used?

Different representations may be
suitable for different situations.

Information in computers must be
represented in a form convenient for
processing.

Share your answers with the rest of
the class.

Activity 3

Meanings

Different sequences of symbols can
represent the same thing.

Example:
symbol

Activity 3

Meanings

The same sequence of
symbols can represent
different things.

Example:
dab

a kind of fish
a sudden blow or thrust
a gentle touch or stroke
a small amount
a skillful person
a dance move
the musical notes D, A and B
the number 3499
Digital Audio Broadcasting

Activity 4

What we have learnt in today's lesson

We invented writing to
store information.

Computers use
symbols to represent
information too.

Some representations
are more convenient
than others.

Patterns of symbols can
mean anything that we
agree they can.

We use symbols to
communicate.

Open Ended

Write down two things you have learnt in today's lesson about how data can be represented.

In this lesson, we...

Examined how symbols
can be used to store,
communicate, and
process information.

Next lesson

Next lesson, we will...

Use paper, lights, and
drums to send and receive
messages.

Summary

Poll

My effort and attitude in this lesson.

• Excellent

  I have done the best I can

• OK

  I could have worked harder

• Not good

  More effort needed by me