Lesson Plan

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Lesson Plan
Grade: Grade 9 Date: 17/01/2026
Subject: Computer Science
Lesson Topic: Use arrays to store multiple values of the same data type
Learning Objective/s:
  • Describe what an array is and its characteristics.
  • Explain why arrays are useful for storing multiple values of the same type.
  • Demonstrate how to declare, initialise, and access array elements in pseudo‑code.
  • Apply looping constructs to process all elements of an array.
  • Identify and correct common array errors such as out‑of‑bounds indexing.
Materials Needed:
  • Projector or interactive whiteboard
  • Printed handout of array declaration table
  • Laptop computers with a simple IDE or pseudo‑code editor
  • Whiteboard and markers
  • Practice worksheet with pseudo‑code exercises
 Introduction:
Begin with a quick poll: “How many different variables would you need to store five test scores?” Connect this to the need for a single structure. Review the concept of variables and indexing. State that by the end of the lesson students will be able to create and manipulate arrays to solve problems.
Lesson Structure:
  1. Do‑Now (5'): Students list the variables they would need for a set of temperatures; teacher collects responses.
  2. Direct Instruction (10'): Explain array definition, indexing, and declaration using the table from the notes; show examples on the projector.
  3. Guided Practice (15'): Walk through initialising an array and accessing elements, then model a loop that calculates an average.
  4. Independent Activity (10'): Learners complete the practice question – write pseudo‑code to read 8 temperatures and output the highest value.
  5. Check for Understanding (5'): Quick quiz (exit ticket) where students write the correct syntax for accessing the third element of an array named scores.
Conclusion:
Recap the key steps: declaring, initialising, accessing, and looping through arrays. Collect the exit tickets and highlight common mistakes observed. Assign homework: create a short pseudo‑code program that stores and averages a list of five user‑entered numbers.