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What to create	Lesson plan
Which subject	Computer science
What topic	Δομή Επανάληψης ΑΕΠ
What length (min)	30
What age group	College
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Lesson Plan: Δομή Επανάληψης ΑΕΠ (Iteration Structures in Programming)

Subject

Computer Science

Duration

30 minutes

Objective

By the end of this lesson, students will be able to understand and apply iteration structures in programming, specifically focusing on loops (for, while, and do-while) and their usage in algorithm development.

Materials Needed

• Whiteboard and markers
• Projector for slides
• Laptops or computers with a programming environment (e.g., Python, Java)

Lesson Outline

Introduction (5 minutes)

• Definition of Iteration Structures: Explain what iteration structures are and their importance in programming.
• Real-World Analogy: Use a simple analogy like a repetitive task (e.g., filling bottles) to illustrate the need for loops.

Types of Iteration Structures (10 minutes)

• For Loop:
  • Syntax and use cases
  • Example given in pseudocode/actual code

    for i in range(1, 11):  
      print(i)

• While Loop:
  • Syntax and situations where it is beneficial
  • Example in pseudocode/actual code

    i = 1
    while i <= 10:
      print(i)
      i += 1

• Do-While Loop:
  • Explanation and difference from while loop
  • Example in pseudocode/actual code

    i = 1
    while True:
      print(i)
      i += 1
      if i > 10: 
          break

Practical Application (10 minutes)

• Hands-On Exercise:
  • Students will write a simple program in their preferred programming language using each of the loops discussed.
  • Make sure they compute the sum of the first 100 numbers using different loop structures.

Wrap-Up and Homework (5 minutes)

• Review Key Points: Summarize the loops covered and their applications.
• Homework Assignment: Provide students with a set of tasks to reinforce their understanding.

Homework Assignment

1. Write a program using a for loop that calculates the factorial of a given number.
2. Create a program using a while loop that prints all even numbers from 1 to 50.
3. Design a do-while loop program that asks a user for a number and keeps asking until they enter a negative number.

Homework Answers

1. Factorial using For Loop:

   number = int(input("Enter a number: "))
   factorial = 1
   for i in range(1, number + 1):
       factorial *= i
   print("Factorial:", factorial)

2. Even Numbers using While Loop:

   i = 1
   while i <= 50:
       if i % 2 == 0:
           print(i)
       i += 1

3. Do-While Loop Example (Python does not have a do-while structure, simulate it):

   while True:
       num = int(input("Enter a number (negative to quit): "))
       if num < 0:
           break

Conclusion

Encourage students to explore different problems and implement various iteration structures to find the most efficient solutions. Reinforce the importance of understanding loops in programming and software development.