This is a quick little mini-unit exploring the notion of PRIME and COMPOSITE numbers, for students in French Immersion. This resource includes a brief overview of prime and composite numbers, some tips and tricks on how to identify them, how they are used, and an exploratory activity called ' The sieve of Eratosthenes', allowing students to identify all prime numbers within 1 - 100. Bon apprentissage ! Mme Geneviève p.s. If you enjoy this resource, feel free to check out all my other French I