While a quick Google search might lead you to “free PDF” download sites, be careful:
The workbook is designed for Secondary 3 students (the first year of Cycle 2 in Quebec). It is structured to make French feel "alive" by connecting language rules to the real world through social media-inspired visuals and guest experts like Fred Pellerin and Catherine Ethier. Cahier Francais Mag Secondaire 3 Corrige Pdf
You can find the teacher's edition/corrigé at retailers such as Renaud-Bray . While a quick Google search might lead you