# Count controlled iteration

In this lesson, we will develop a Scratch version of the nursery rhyme Ten Green Bottles, using count-controlled iteration. We will be introduced to the concept of debugging and will be given a program to debug by tracing the value of the variables.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

#### Unit quizzes are being retired in August 2023

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Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.The greater than symbol in the image below is an example of a comparison operator or a logic operator?

1/6

Q2.The greater than symbol in the image below is an example of a comparison operator or a logic operator?

2/6

Q3.Does the following statement evaluate as True or False? - (30 < 50) or (30 > 50)

3/6

Q4.Does the following statement as True or False? - (20 = 20) and (15 < 15)

4/6

Q5.Does the following statement as True or False? - not (20 = 20)

5/6

Q6.Which of the conditions would evaluate to ‘true’ with the following inputs? [2 answers]

Select two (2) boxes

6/6

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.The greater than symbol in the image below is an example of a comparison operator or a logic operator?

1/6

Q2.The greater than symbol in the image below is an example of a comparison operator or a logic operator?

2/6

Q3.Does the following statement evaluate as True or False? - (30 < 50) or (30 > 50)

3/6

Q4.Does the following statement as True or False? - (20 = 20) and (15 < 15)

4/6

Q5.Does the following statement as True or False? - not (20 = 20)

5/6

Q6.Which of the conditions would evaluate to ‘true’ with the following inputs? [2 answers]

Select two (2) boxes

6/6

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Count controlled iteration

Helping you to assess what you have learnt this lesson

Q1.In our lesson we learnt about two types of iteration (loops). Which of the two is the following sentence describing: "This type of iteration will execute the commands until the condition you set is no longer being met"

1/4

Q2.Which of the following terms describes the process of finding an error in your code and taking steps to fix the problem.

2/4

Q3.Which of the following blocks of code would make the Scratch cat say “1, 2, 3” leaving a second in between each number?

3/4

Q4.What will be outputted (what will be said) when the following program is executed?

4/4

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Count controlled iteration

Helping you to assess what you have learnt this lesson

Q1.In our lesson we learnt about two types of iteration (loops). Which of the two is the following sentence describing: "This type of iteration will execute the commands until the condition you set is no longer being met"

1/4

Q2.Which of the following terms describes the process of finding an error in your code and taking steps to fix the problem.

2/4

Q3.Which of the following blocks of code would make the Scratch cat say “1, 2, 3” leaving a second in between each number?

3/4

Q4.What will be outputted (what will be said) when the following program is executed?

4/4

# Lesson summary: Count controlled iteration

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## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Walk

On the spot:
Chair yoga