In this lesson, we will explore the world of prime and non-prime (composite) numbers in a simple and engaging way. The goal is to enhance students' understanding of mathematical fundamentals while connecting them to practical applications. What the student will learn in this lesson: 1. Definition of prime and non-prime numbers: • Explain the difference between a prime number and a non-prime number in a clear and smooth way. • Provide practical examples from daily life to link concepts to mathematics. 2. Methods for verifying the primacy of a number: • Use systematic steps to verify whether a number is prime or not. • Apply methods using division and factors. 3. The mathematical importance of prime numbers: • How are prime numbers used in cryptography and data security? • Its role in building the foundations of mathematics and computer science. 4. Practical application: • Training the student to analyze numbers and classify them into prime and non-prime. • Solve interactive examples and questions that help build logical thinking.