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Key Stage 2Ages 7-11Computing

Free Algorithms Worksheets for Key Stage 2

Step-by-step problem solving. Download free printable computing worksheets designed for Key Stage 2 students (ages 7-11), aligned to the UK National Curriculum.

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What Your Child Will Learn

Design algorithms using sequence, selection, and iteration
Trace algorithms to predict outputs
Describe and apply simple sorting and searching algorithms
Use flowcharts and pseudocode to represent algorithms

Sample Algorithms Questions for Key Stage 2

Here are examples of the types of questions your child will practice:

1

Trace through this algorithm: x = 5, x = x + 3, PRINT x. What is the output?

mediumshort answer
2

Describe the bubble sort algorithm and trace it on the list: 4, 1, 3, 2.

hardshort answer
3

Draw a flowchart for an algorithm that checks if a number is odd or even.

mediumshort answer
4

What is decomposition in computing and why is it useful?

mediumshort answer
5

Explain the difference between linear search and binary search.

hardshort answer
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Skills Your Child Will Build

Decomposition
Pattern recognition
Abstraction
Logical reasoning

Real-World Applications

Understanding algorithms helps children in everyday situations:

Search engines
GPS navigation
Social media feeds
Game design

Common Mistakes to Watch For

Help your child avoid these common algorithms mistakes:

  • !Imprecise instructions (not unambiguous)
  • !Infinite loops in design
  • !Missing edge cases
  • !Confusing algorithm with program

Learning Progression

These algorithms skills prepare students for secondary school, where they will encounter more challenging applications and abstract concepts.

Sample Algorithms Worksheets

1 available

Algorithms Worksheet - KS2 - Intermediate

intermediate
330

Algorithms Worksheet Preview

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Algorithms Worksheet - KS2 - Intermediate

Key Stage 2 · intermediate difficulty

Preview

Activity 1: Understanding Algorithms

Read the following algorithm steps and arrange them in the correct order to make a sandwich. Write the correct sequence number next to each step.

1. Spread butter on one slice of bread. ______
2. Place a slice of cheese on the buttered bread. ______
3. Put the second slice of bread on top. ______
4. Take two slices of bread. ______

Activity 2: Flowchart Creation

Create a flowchart for making a cup of tea. Use the steps provided to draw a simple flowchart. Write the step numbers in the boxes provided.

1. Boil water. ______
2. Add tea bag to cup. ______
3. Pour hot water into the cup. ______
4. Stir and enjoy. ______
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Tips for Teaching Algorithms

1Use everyday instructions as starting algorithms
2Flowcharts help visualise branching logic
3Trace tables make algorithm tracing systematic
4Decomposition: breaking a problem into sub-problems is the key skill

More Computing Topics for Key Stage 2

CodingInternet Safety

Algorithms for Other Age Groups

Early Years

Ages 0-2

Nursery

Ages 3-4

Reception

Ages 4-5

Key Stage 1

Ages 5-7

Key Stage 3

Ages 11-14

GCSE

Ages 14-16

A-Level

Ages 16-18

Frequently Asked Questions

What algorithms topics are covered in these worksheets?▼
Our algorithms worksheets for Key Stage 2 cover all aspects of step-by-step problem solving as required by the UK National Curriculum. Each worksheet is designed to build skills progressively from foundation to challenge level.
Are these algorithms worksheets suitable for Key Stage 2?▼
Yes, these worksheets are specifically designed for Key Stage 2 students (ages 7-11). The content difficulty and question types are carefully matched to National Curriculum expectations for this age group.
How can I use these algorithms worksheets effectively?▼
We recommend 15-20 minutes of focused practice per session. Use the worksheets to reinforce concepts taught at school, identify areas needing more practice, and build confidence. Every worksheet includes an answer key for easy self-assessment.
Do the algorithms worksheets include answer keys?▼
Yes, every worksheet comes with a complete answer key on a separate page. This makes it easy for parents to check homework, teachers to mark work, and students to self-assess their understanding.

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