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Challenge Worksheet

TN-CSCI-GR4-33693 · v3.1

Introduction to Algorithms

Grade 4 · Computer Science · Algorithms · OCR

Grade

Grade 4

Subject

Computer Science

Topic

Algorithms

Subtopic

Introduction to Algorithms

Curriculum

OCR

Difficulty

Higher

Time

35 minutes

Total marks

36

Student name

Teacher name

Date

Learning objectives

  • Recognise introduction to algorithms accurately in computer science contexts.
  • Explain the underlying rule of introduction to algorithms in the student's own words.
  • Apply introduction to algorithms to multi-step and unfamiliar problems.
  • Justify a chosen method and identify errors in another student's work.

Skills assessed

  • Fluency and recall
  • Method and setting out
  • Reasoning and justification
  • Problem solving in context
  • Self-assessment

Instructions

  1. Write your name, your teacher's name and the date in the header.
  2. Answer every question in the space provided. Continue on the back if needed.
  3. Show all working — method marks are awarded even when the final answer is wrong.
  4. Aim to finish in about 35 minutes.
  5. Complete the reflection box at the end before you hand the sheet in.

Warm-up

Bloom: Remember · 3 marks

Answer quickly. These check you are ready for the topic.

  1. 1.Circle one fact you already know about introduction to algorithms.

    [1]
  2. 2.Write down one fact you already know about introduction to algorithms.

    [1]
  3. 3.State one fact you already know about introduction to algorithms.

    [1]

Recall

Bloom: Remember · 3 marks

Complete from memory. No calculator, no notes.

  1. 1.List the key term used in introduction to algorithms described here: item 1.

    [1]
  2. 2.Complete the key term used in introduction to algorithms described here: item 2.

    [1]
  3. 3.Complete the key term used in introduction to algorithms described here: item 3.

    [1]

FreeMathWorksheet · TN-CSCI-GR4-33693 · v3.1

© 2026 FreeMathWorksheet. Licensed for classroom and home use. Redistribution or resale is not permitted.

Page 1 of 4

FreeMathWorksheet · Grade 4 Computer Science

Introduction to Algorithms

Basic Practice

Bloom: Understand · 4 marks

Work through each item. Show the step you used.

  1. 1.Work out part 1 using the rule for introduction to algorithms.

    [1]
  2. 2.Work out part 2 using the rule for introduction to algorithms.

    [1]
  3. 3.Work out part 3 using the rule for introduction to algorithms.

    [1]
  4. 4.Identify part 4 using the rule for introduction to algorithms.

    [1]

Guided Practice

Bloom: Understand · 6 marks

The first step is given. Finish the reasoning.

  1. 1.Continue the working for part 1. Step 1 has been started for you.

    [2]
  2. 2.Complete the method for part 2. Step 1 has been started for you.

    [2]
  3. 3.Continue the working for part 3. Step 1 has been started for you.

    [2]

FreeMathWorksheet · TN-CSCI-GR4-33693 · v3.1

© 2026 FreeMathWorksheet. Licensed for classroom and home use. Redistribution or resale is not permitted.

Page 2 of 4

FreeMathWorksheet · Grade 4 Computer Science

Introduction to Algorithms

Independent Practice

Bloom: Apply · 8 marks

No scaffolding. Set out your full method.

  1. 1.Determine part 1 on introduction to algorithms without help.

    [2]
  2. 2.Solve part 2 on introduction to algorithms without help.

    [2]
  3. 3.Calculate part 3 on introduction to algorithms without help.

    [2]
  4. 4.Work out fully part 4 on introduction to algorithms without help.

    [2]

Challenge Questions

Bloom: Analyse · 6 marks

Harder items. Attempt every one, even partially.

  1. 1.Deduce the statement in part 1 about introduction to algorithms.

    [3]
  2. 2.Show that the statement in part 2 about introduction to algorithms.

    [3]

Real-life Application

Bloom: Apply · 6 marks

Use the skill in context. State units in your answer.

  1. 1.Apply a real computer science situation that depends on introduction to algorithms.

    [3]
  2. 2.In context, work out a real computer science situation that depends on introduction to algorithms.

    [3]

FreeMathWorksheet · TN-CSCI-GR4-33693 · v3.1

© 2026 FreeMathWorksheet. Licensed for classroom and home use. Redistribution or resale is not permitted.

Page 3 of 4

FreeMathWorksheet · Grade 4 Computer Science

Introduction to Algorithms

Reflection

Bloom: Create · 0 marks

Not marked. Answer honestly — this guides your next worksheet.

  1. 1.Record how confident you feel with introduction to algorithms and what you will practise next.

    [—]
  2. 2.Describe how confident you feel with introduction to algorithms and what you will practise next.

    [—]

FreeMathWorksheet · TN-CSCI-GR4-33693 · v3.1

© 2026 FreeMathWorksheet. Licensed for classroom and home use. Redistribution or resale is not permitted.

Page 4 of 4