Y4 Unit 2 Part 1

Unit 2 : Be a
Data Controller

In this unit, you will learn about databases, forms and sorting data.
You will learn:

• about paper-based and digital databases

• about using form to collect data

• about data and information

• to sort data into order

• ​Databases

• Using forms to collect data

• Data vs Information

• Play Blooket (Data vs Information)

Databases

• ​This teacher collects some information from her students.

• She writes each student's information on a sheet of paper.

• She stores each students' information in a file.

• She then places the file in a filing cabinet like this.

Multiple Choice

Will the teacher take some time to search for a student file?

Multiple Choice

Can the teacher misplace a file?

Multiple Choice

Will it be difficult to make changes to students' information on paper?

Multiple Choice

Will the teacher need a lot of space to store the files?

Multiple Choice

Is there a better way for the teacher to store students' information?

Open Ended

What can she do?

Databases
Physical vs Digital

​Database

• ​collection of related data

• can be physical or digital

• Physical

  • paper based

• Digital

  • electronic
    

Drag and Drop

A ​

Placeholder

is a ​

Placeholder

of ​

Placeholder

data.

Drag these tiles and drop them in the correct blank above

database

collection

related

Physical Databases

• main method of storing data before computers became popular

• stored in filing cabinets

• still used by many small organisation (company)

• Examples :

  • telephone directories

  • a diary

  • printed address book

Digital Databases

• can only be accessed by using a computer

• computerised sales terminal
  

• Other businesses that use digital databases:

  • restaurant, for keeping track of food orders

  • hospitals, for patient record keeping

Practice
#1

Drag and Drop

A ​

Placeholder

is an ​

Placeholder

​ collection of ​

Placeholder

data.

Drag these tiles and drop them in the correct blank above

database

related

organised

Labelling

State the type of database shown in each picture : Physical or Digital.

Drag labels to their correct position on the image

Physical

Digital

Categorize

Options (6)

Easy and quick to sort data

Changes made to the data can be messy

Data is recorded on paper

Can easily make a copy of data

Data can be easily found

Searching for data can be difficult

State whether each description is for a physical or digital database.

Physical Database

Digital Database

Using forms to
collect data
Advantages and Disadvantages

Form

• document with headings and spaces to collect data.

• can be paper-based or electronic

Advantages

• Everyone fills in the form in the same way.

  • This makes it easy to compare answers.

• A form can have different types of questions such as Checkboxes and Multiple-choice for easy completion.

  • This reduces the amount of writing.

• It is easy to make a copy of a form.

• Forms can be easily sent to lots of people to collect data.

• A form can gather the correct type of data.

• It is a fast way of collecting data.

Disadvantages

• It takes time to design a good form.

• Questions have to be written very carefully.

  • If they are not, it can mean getting the wrong data.

• It costs money to copy paper-based forms.

• People must have a device to complete electronic forms.

• Forms can contain private data.

  • Care must be taken to make sure the wrong people cannot access the form.

• If paper-based forms are destroyed, the data may be lost.

Practice #2

Multiple Choice

Forms are only paper-based.

Multiple Choice

More writing is required with forms.

Multiple Choice

It takes time to write questions in a form.

Multiple Choice

You must have access to a device to complete an electronic form.

Multiple Select

1. David is helping Raj to create a form to collect some data from the members of his cricket team. From the statements below, select the advantages of Raj using a

   form to collect the data from his teammates.

• 1. It costs money to make copies of a paper-based form.

• 1. Raj can easily send the forms to his teammates.

• 1. Raj needs to take time to design the form.

• 1. Using a form is a fast way to collect data.

Categorize

Options (4)

1. A poorly-designed form can affect the collection of data.

1. Different people fill out a form in the same way.

1. Almost anyone can fill in a form.

1. If paper-based forms are destroyed, then the data is lost.

1. State whether the following sentences are advantages or disadvantages of using a form to collect data:

Advantages

Disadvantages

Open Ended

1. Can you think of any other advantages and disadvantages of using forms to collect data, besides the ones stated in the Learn panel on page 25?

Data vs Information
What is the difference?

Data

• Data can be in the form of numbers, letters, symbols, images and sounds.

• Data on its own has no meaning or context.

• It is unorganised. This raw data needs to be processed to produce information.

Information

• For example, if the heights of students in a class are processed by a computer, we can get information such as:

  • the tallest student in class

  • the shortest student in class

  • the average height of the students in the class.

• Information is useful because it is organised and has some context and meaning.

​raw data: not processed
information: processed data

• ​Data are simply values.

• They do not have any meaning

• They have not been interpreted

• They have not been compared to other values

• They have not been used for a calculation.

  • For example, 1 and 3 are just data.

• Information comes from comparing data, or using it to do a calculation or a sort.

• In our example, while 1 and 3 are data, the following are examples of information:

  • ‘3 is bigger than 1’

  • there are 2 numbers in total,

  • the sum is 4,

  • the average is 2.

​DATA

​INFORMATION

​IMPORTANT!!!

​The first table below shows raw data.
We do not know what the numbers mean.

​The second table shows the average monthly temperature in London. Now we know what the numbers mean. This is an example of information.

Practice
#3

Multiple Choice

1. The weight of each student in class.

• DATA

• INFORMATION

Multiple Choice

1. The average rainfall for the month of July.

• DATA

• INFORMATION

Multiple Choice

1. The flavour of ice-cream each person chose at the ice-cream parlour.

• DATA

• INFORMATION

Multiple Choice

1. The least favourite flavour ice-cream.

• DATA

• INFORMATION

Multiple Choice

1. The most popular sport at school.

• DATA

• INFORMATION

Multiple Choice

1. Raw data is _________.

• 0. processed

• 0. unprocessed

• 0. organised

Multiple Choice

1. Information is _______________ data

• 0. processed

• 0. unprocessed

• 0. organised

Multiple Choice

1. Data is _______________.

• 0. meaningful

• 0. meaningless
     

Multiple Choice

1. Information is _______________.

• 0. useless

• 0. useful
     

Multiple Choice

1. Data is _______________.

• 0. organised letters and numbers

• 0. unorganised letters and numbers
     

Multiple Choice

1. Information is _______________.

• 0. organised letters and numbers

• 0. unorganised letters and numbers
     

​https://play.blooket.com/play